A cotton filling device for sofa production

Abstract

This utility model relates to the field of sofa filling technology, specifically to a cotton filling device for sofa production. It includes a cotton storage bin, a fan located on one side of the storage bin, and a conveying pipe connecting the storage bin and the fan. A Y-shaped tee pipe is located on the side of the fan away from the storage bin. One end of the tee pipe is installed on the output end of the fan. A baffle plate is installed inside the tee pipe, and a rotating shaft is located at the other end of the baffle plate. A sleeve hole is opened at the corner of the tee pipe, and the rotating shaft is rotatably fitted into this sleeve hole. Two filling pipes are located on the side of the tee pipe away from the storage bin, and each filling pipe is equipped with a clamping device. The clamping device includes a clamp on the filling pipe, two arc-shaped grippers on the side of the clamp away from the tee pipe, clamping rods on both sides of the grippers, and a telescopic cylinder on one side of the clamping rods. This utility model provides a cotton filling device for sofa production that reduces the number of fan start-stop cycles and alleviates the labor intensity of operators.

Description

Technical Field

[0001] This utility model relates to the field of sofa filling technology, specifically to a cotton filling device for sofa production. Background Technology

[0002] A sofa is a multi-seat piece of furniture with soft cushions and armrests on both sides, allowing people to sit or lie down for rest, making it a common type of soft furniture. A sofa mainly consists of three parts: the frame, the fabric, and the filling. The frame is made of sturdy materials such as wood, metal, or engineered wood to provide structural support, ensuring the sofa's overall stability and durability. The fabric is used to tightly wrap and secure the internal filling and comes into direct contact with the body; therefore, choosing a highly breathable fabric is crucial. This type of fabric effectively prevents the stuffiness and stickiness caused by sweat buildup, significantly improving the comfort of sitting or lying on the sofa. The choice of sofa filling plays a vital role in the sofa's comfort. Foam is the most common filling material, effectively distributing the pressure of the body when sitting or lying on the sofa, reducing discomfort from prolonged sitting, and thus greatly improving seating comfort.

[0003] In the manufacturing process of sofas, the filling process is particularly important, directly affecting the user experience, functionality, and durability. Manual filling is not only time-consuming and labor-intensive but also inefficient, failing to meet the needs of modern production. Therefore, using a filling device has become a common choice in the industry. A filling device mainly consists of a storage bin, a fan, and a filling tube. During operation, the fluffy filling material is first placed in the storage bin. Then, the open end of the seat cover, back cover, or other outer cover is tightly fitted onto the filling tube of the filling device. The negative pressure generated by the fan then propels the filling material stored in the storage bin through the filling tube into the outer cover, completing the filling process quickly and efficiently. However, in practice, after the outer cover is filled, to prevent the filling material from overflowing from the filling tube, the fan must be stopped before removing the outer cover from the filling tube. This inevitably leads to frequent fan starts and stops, which, in the long run, negatively impacts the fan's lifespan, increases equipment maintenance costs, and raises the failure rate. Furthermore, during the filling process, the open end of the outer jacket needs to be manually and tightly fitted onto the filling tube of the filling device. Since operators have limited physical strength, prolonged repetitive operations inevitably lead to fatigue, making it difficult to maintain operational stability and accuracy, thus affecting the filling effect and work efficiency. Therefore, the filling device still has some shortcomings in practical applications. Improvements to the filling device can reduce the number of fan starts and stops, alleviate the operator's workload, and improve operational convenience and overall filling efficiency. Summary of the Invention

[0004] In view of the shortcomings of the prior art, this utility model provides a cotton filling device for sofa production that reduces the number of times the fan starts and stops, thereby reducing the labor intensity of operators, and overcomes the defects in the prior art.

[0005] The technical solution adopted by this utility model is as follows: a cotton filling device for sofa production, including a cotton storage bin, a fan arranged on one side of the cotton storage bin, and a conveying pipe arranged between the cotton storage bin and the fan. A Y-shaped tee pipe is arranged on the side of the fan away from the cotton storage bin. One end of the tee pipe is installed on the output end of the fan. A baffle plate is arranged inside the tee pipe, with one end of the baffle plate contacting the inner wall of the tee pipe near the fan. A rotating shaft is arranged at the other end of the baffle plate. A sleeve hole is opened at the corner of the tee pipe, and the rotating shaft is rotatably fitted into the sleeve hole. Two filling tubes are provided, each installed on one end of a T-shaped pipe. Each filling tube is equipped with a clamping device. The clamping device includes a clamp on the filling tube, two arc-shaped jaws on the side of the clamp away from the T-shaped pipe, clamping rods on both sides of the jaws, and a telescopic cylinder on one side of the clamping rods. The telescopic cylinder is mounted on the clamp, with its telescopic end connected to the clamping rod. One end of the clamping rod is hinged to the clamp, and the other end is connected to the jaws. The jaws are fitted onto the filling tubes, and the clamp holds and fixes the filling tubes in place.

[0006] Preferably, a fixing rod is provided at the end of the clamping rod away from the clamping claw. One end of the fixing rod is installed on one end of the clamping rod. A fixing block made of elastic material is provided on one side of the fixing rod. The two sides of the fixing block are in contact with the fixing rods installed on one clamping rod and the other clamping rod, respectively. A support rod is provided on one side of the tee pipe. The support rod is parallel to the baffle plate. One end of the support rod is installed at the end of the rotating shaft. A connecting rod is provided at the other end of the support rod. The two ends of the connecting rod are installed on the support rod and the fixing block, respectively. A handle is provided at the other end of the support rod. The bottom end of the handle is installed on the support rod.

[0007] Preferably, the clamping rod adopts an n-shaped structure, with a groove on the side of the clamping rod near the clamp, and a round block fitted inside the groove. The diameter of the round block matches the width of the groove. A bracket is provided on the side of the round block away from the filling tube, and the bracket is connected to the round block. The bracket is installed on the telescopic end of the telescopic cylinder. A hinge rod is provided on the clamp, which is located between the bracket and the filling tube. One end of the hinge rod is installed on the outer wall of the clamp, and one end of the clamping rod is hinged to the clamp via the hinge rod.

[0008] Preferably, the gripper is provided with a fixing plate at both ends, one end of the fixing plate is installed on the outer wall of the gripper, and the end of the gripper rod away from the T-tube is installed on the fixing plate; the gripper is provided with a pad made of elastic material, the middle part of the pad is installed on the inner wall of the gripper, and the side part of the pad is installed on the fixing plate.

[0009] Preferably, the end of the filling tube away from the tee tube is provided with a guide groove at an angle, and the width of the guide groove gradually increases from top to bottom.

[0010] Preferably, observation slots are provided on both sides of the cotton storage bin, and observation windows made of transparent material are provided in the observation slots. The shape and structure of the observation windows match the structure of the observation slots, and the observation windows are installed on the cotton storage bin. A feed pipe is provided on the cotton storage bin, and one end of the feed pipe is installed at the top of the cotton storage bin and is connected to the cotton storage bin.

[0011] The beneficial effects of this utility model are as follows: First, the utility model uses a three-way pipe to connect both filling pipes to the blower. Furthermore, a baffle plate inside the three-way pipe blocks the conveying channel between the blower and one of the filling pipes. A rotating shaft mounted on the baffle plate allows for switching the blocking position. Thus, after one filling pipe completes its filling operation, rotating the shaft switches the baffle plate's blocking position, allowing the other filling pipe to be used for filling. This enables repeated filling operations, improving continuous filling efficiency, reducing the number of blower starts and stops, and increasing filling work efficiency. Furthermore, this utility model uses a clamp to assemble the gripper, clamping rod, and telescopic cylinder onto the filling tube. By controlling the telescopic cylinder to extend and retract, the clamping rod and gripper rotate around the hinge point between the clamping rod and the filling tube. This allows the gripper to hold and fix the outer cover, such as the seat cushion cover or backrest cover, which is fitted onto the filling tube, onto one of the filling tubes. This replaces the manual handling of the outer cover for filling operations, thereby reducing the labor intensity of the operator and improving the comfort and safety of the operation.

[0012] Secondly, this invention uses a fixed block to compress one of the clamping rods and the fixed rod on the other clamping rod, preventing the clamps from opening during the filling process and thus preventing the outer jacket held on the filling tube from slipping off. A support rod parallel to the baffle plate drives the fixed block to compress the clamps during the filling process. A handle allows for pushing and pulling the rotating shaft. Furthermore, the invention uses a bracket and a round block to allow the clamping rod to rotate with the extension and retraction of the telescopic cylinder, enabling the clamps to perform clamping or opening actions. A hinge rod connects the end of the clamping rod to the clamping clamp, allowing the clamping rod to drive the clamps to rotate.

[0013] Furthermore, this invention utilizes a fixed plate to connect the clamping rod and jaws, and the fixed plate mounted on the two jaws seals and clamps the edge of the outer jacket opening to prevent cotton leakage during filling, thereby improving filling stability. The elastic material pads on the jaws cushion the clamped outer jacket, preventing damage from the jaws or fixed plates. Additionally, the invention features a guide groove on the filling tube to guide the outer jacket onto the filling tube, an observation window on the cotton storage bin for easy monitoring of cotton storage information, and a feed pipe to deliver filling material into the cotton storage bin. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0015] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.

[0016] Figure 3 This is a schematic diagram of the assembly of the blower and the filling tube in this utility model.

[0017] Figure 4 This is a three-dimensional view of the assembly of the three-way pipe and the cotton filling pipe in this utility model.

[0018] Figure 5 for Figure 4 Enlarged diagram of point C in the middle.

[0019] Figure 6 This is a cross-sectional view of the assembly of the tee tube and the filling tube in this utility model.

[0020] Figure 7 This is a three-dimensional view of the assembly of the telescopic cylinder, the circular block, and the bracket in this utility model. Detailed Implementation

[0021] like Figures 1 to 7As shown, a cotton filling device for sofa production includes a cotton storage bin 1, a fan 2 disposed on one side of the cotton storage bin 1, and a conveying pipe 3 disposed between the cotton storage bin 1 and the fan 2. The bottom of the cotton storage bin 1 is connected to the input end of the fan 2 through the conveying pipe 3. A Y-shaped three-way pipe 4 is disposed on the side of the fan 2 away from the cotton storage bin 1. One end of the three-way pipe 4 is installed on the output end of the fan 2. A baffle plate 5 is disposed inside the three-way pipe 4. One end of the baffle plate 5 contacts the inner wall of the three-way pipe 4 near the fan 2. A rotating shaft 6 is disposed at the other end of the baffle plate 5. The middle part of the rotating shaft 6 is mounted on the baffle plate 5. A sleeve hole is opened at the corner of the three-way pipe 4. The rotating shaft 6 is rotatably fitted into the sleeve hole to hinge the baffle plate 5 inside the three-way pipe 4. The end of the shaft 6 passes through the hole, and the diameter of the shaft 6 matches the diameter of the hole. Two filling pipes 7 are provided on the side of the three-way pipe 4 away from the cotton storage bin 1. The two filling pipes 7 are respectively installed on the other two ends of the three-way pipe 4. The two filling pipes 7 are respectively connected to the blower 2 through the three-way pipe 4. The two filling pipes 7 are respectively provided with clamping devices. The baffle plate 5 is used to block the conveying channel between the blower 2 and one of the filling pipes 7. Its purpose is to switch the conveying channel of the three-way pipe 4 by operating the shaft 6. The specific operation method is as follows: by rotating the shaft 6, the baffle plate 5 is driven to rotate, so that one end of the baffle plate 5 rotates from one side of the three-way pipe 4 to the other side of the three-way pipe 4, so that one end of the baffle plate 5 is connected to the three-way pipe 4. The inner wall on the other side of the connecting pipe 5 contacts the flow plate 5 to block the conveying channel on the other side of the three-way pipe 4. Conversely, when it is necessary to switch the flow plate 5 to block the conveying channel on one side of the three-way pipe 4, the rotating shaft 6 is reversed, causing the flow plate 5 to rotate in reverse, so that one end of the flow plate 5 rotates from the other side of the three-way pipe 4 to one side of the three-way pipe 4, so that one end of the flow plate 5 contacts the inner wall on one side of the three-way pipe 5, thereby blocking the conveying channel on one side of the three-way pipe 4. For this purpose, one end of the three-way pipe 4 is the input end of the three-way pipe 4, and the other two ends of the three-way pipe 4 are the output ends of the three-way pipe 4. The clamping device includes a clamp 8 set on the filling tube 7, and two clamps are set on the side of the clamp 8 away from the three-way pipe 4. The device consists of an arc-shaped gripper 9, gripping rods 10 on both sides of the gripper 9, and a telescopic cylinder 11 on one side of the gripping rod 10. The telescopic cylinder 11 is mounted on the clamp 8, and the telescopic end of the telescopic cylinder 11 is connected to the gripping rod 10. One end of the gripping rod 10 is hinged to the clamp 8, and the other end of the gripping rod 10 is connected to the gripper 9. The gripper 9 is fitted onto the filling tube 7, and the clamp 8 clamps and fixes it onto the filling tube 7. By controlling the extension and retraction of the telescopic cylinder 11, the gripping rod 10 and the gripper 9 are driven to rotate around the hinge point of the gripping rod 10 and the filling tube 7, so that the gripper 9 can clamp and fix the outer cover such as the seat cushion cover and backrest cover fitted onto one of the filling tubes 7. Then, by operating the rotating shaft 6 to rotate, the filling operation of the outer cover is completed.Simultaneously, by operating the clamping device mounted on another filling tube 7, the outer sleeve fitted on that tube is replaced. After one filling tube 7 is filled, the rotating shaft 6 is rotated in the opposite direction to begin filling the other filling tube 7. Similarly, the clamping device mounted on one of the filling tubes 7 is operated again to replace the outer sleeve, allowing for continuous filling operations, thereby improving filling efficiency and reducing the number of times the fan 2 starts and stops.

[0022] In this embodiment, a fixing rod 12 is provided at the end of the clamping rod 10 away from the clamping jaw 9. One end of the fixing rod 12 is mounted on one end of the clamping rod 10. A fixing block 13 made of elastic material is provided on one side of the fixing rod 12. The two sides of the fixing block 13 are in contact with the fixing rod 12 mounted on one clamping rod 10 and the other clamping rod 10, respectively. A support rod 14 is provided on one side of the three-way pipe 4. The support rod 14 is parallel to the baffle plate 5. One end of the support rod 14 is mounted on the end of the rotating shaft 6. A connecting rod 15 is provided at the other end of the support rod 14. The two ends are respectively installed on the support rod 14 and the fixing block 13. There are two connecting rods 15 and two fixing blocks 13 installed on the support rod 14. The fixing block 13 squeezes one of the clamping rods 10 and the fixing rod 12 installed on the other clamping rod 10 to prevent the clamping claws 9 from opening during the filling process, thereby preventing the outer cover from slipping out of the filling tube 7. The other end of the support rod 14 is provided with a handle 16. The bottom end of the handle 16 is installed on the support rod 14. By holding the handle 16 and pulling, the support rod 14 and the rotating shaft 6 are rotated.

[0023] Specifically, the clamping rod adopts an n-shaped structure. A groove 17 is provided on the side of the clamping rod 10 near the clamping tube 8. A round block 18 is fitted inside the groove 17. The diameter of the round block 18 matches the width of the groove 17. A bracket 19 is provided on the side of the round block 18 away from the filling tube 7. The bracket 19 is connected to the round block 18 and is installed on the telescopic end of the telescopic cylinder 11. By controlling the telescopic cylinder 11 to extend or retract, the bracket 19 pushes the round block 18 to move, thereby driving the clamping rod 10 to rotate. A hinge rod 20 is provided on the clamping tube 8. The hinge rod 20 is located between the bracket 19 and the filling tube 7 to prevent the hinge rod 20 from interfering with the movement of the bracket 19. One end of the hinge rod 20 is installed on the outer wall of the clamping tube 8. One end of the clamping rod 10 is hinged to the clamping tube 8 through the hinge rod 20 so that the clamping rod 10 can drive the gripper 9 to rotate.

[0024] Please refer to it again. Figure 2The clamping claw 9 has a fixing plate 21 at each end. One end of the fixing plate 21 is installed on the outer wall of the clamping claw 9, and the end of the clamping rod 10 away from the three-way pipe 4 is installed on the fixing plate 21 so that the clamping rod 10 and the clamping claw 9 can be connected. The fixing plates 21 installed on the two clamping claws can seal and clamp the edge of the opening end of the outer jacket to avoid cotton leakage during the filling process, thereby improving the filling stability. The clamping claw 9 is provided with a pad 22 made of elastic material. The middle part of the pad 22 is installed on the inner wall of the clamping claw 9, and the side part of the pad 22 is installed on the fixing plate 21, thereby cushioning the clamped outer jacket to prevent the clamping claw 9 or the fixing plate 21 from damaging the outer jacket.

[0025] In this embodiment, the end of the filling tube 7 away from the three-way tube 4 is provided with a guide groove 23 at an angle. The width of the guide groove 23 gradually increases from top to bottom so as to guide the outer sleeve onto the filling tube 7.

[0026] Specifically, observation slots are provided on both sides of the cotton storage bin 1. Observation windows 24 made of transparent material are provided in the observation slots. The shape and structure of the observation windows 24 match the structure of the observation slots. The observation windows 24 are installed on the cotton storage bin 1, so as to facilitate observation of the inner cavity of the cotton storage bin 1 through the observation windows 24, so as to facilitate understanding of cotton storage information. A feed pipe 25 is provided on the cotton storage bin 1. One end of the feed pipe 25 is installed at the top of the cotton storage bin 1. The feed pipe 25 is connected to the cotton storage bin 1 so that cotton material is filled into the cotton storage bin 1 through the feed pipe 25.

[0027] The instructions for using this product are as follows: Figures 1 to 5As shown, firstly, the filling material is cleaned and loosened to ensure it is pure and fluffy. The feed pipe 25, storage bin 1, conveying pipe 3, blower 2, and filling pipe 7 are inspected to ensure smooth material transport. After confirming everything is normal, the fluffy filling material is added to the storage bin 1 via the feed pipe 25. Then, guided by the guide groove 23, the open end of the outer jacket to be filled is fitted onto one of the filling pipes 7, so that the open end of the outer jacket is positioned between the two grippers 9. The telescopic cylinder 11 of one of the filling pipes is then extended, and the clamping rod 10 and grippers 9 are rotated around the hinge rod 20 by the round block 18 and bracket 19, using the grippers 9 and fixing plate 21 to compress and fix the outer jacket fitted onto one of the filling pipes 7. Next, by pulling the handle 16, the fixing block 13 is pressed between the clamping rod 10 and the fixing rod 12 mounted on one of the filling tubes 7. Then, by starting the blower 2, the filling material of the cotton storage bin 1 is filled into the outer jacket. During the filling process of the outer jacket held on one of the filling tubes 7, another outer jacket to be filled is taken out, and the open end of the other outer jacket is fitted onto another filling tube 7, so that the open end of the other outer jacket is also located between the two clamps 9. Then, by controlling the telescopic cylinder 11 mounted on the other filling tube to extend, the clamping rod 10 and the clamps 9 are pushed to rotate around the hinge rod 20 by the round block 18 and the bracket 19, so that the clamps 9 and the fixing plate 21 are used to press and fix the outer jacket fitted onto the other filling tube 7. After filling the outer jacket held on one of the filling tubes 7 with cotton, the handle 16 is pulled again to press the fixing block 13 between the clamping rod 10 and fixing rod 12 mounted on the other filling tube 7. This allows the filling material from the cotton storage bin 1 to be filled into the outer jacket held on the other filling tube 7 by the blower 2. Subsequently, the telescopic cylinder 11 controlling one of the filling tubes is retracted to release the compression and fixation on the outer jacket of one of the filling tubes 7, making it easy to remove the filled outer jacket. The open end of the outer jacket to be filled is then taken out and fitted onto one of the filling tubes 7, and the above steps are repeated to ensure continuous and efficient completion of the filling operation.

[0028] In this embodiment, the three-way pipe 4 connects both filling pipes 7 to the blower 2. A baffle plate 5 inside the three-way pipe 4 blocks the conveying channel between the blower 2 and one of the filling pipes 7. A rotating shaft 6 mounted on the baffle plate 5 allows for switching the blocking position. Thus, after one filling pipe 7 completes its filling operation, rotating the shaft 6 switches the blocking position of the baffle plate 5, allowing the other filling pipe 7 to be used for filling. This repeated filling operation improves the continuous filling effect, reduces the number of blower starts and stops, and increases filling efficiency. Furthermore, this utility model uses a clamp 8 to assemble the gripper 9, clamping rod 10, and telescopic cylinder 11 onto the filling tube 7. By controlling the telescopic cylinder 11 to extend and retract, the clamping rod 10 and gripper 9 rotate around the hinge point between the clamping rod 10 and the filling tube 7. This allows the gripper 9 to clamp and fix the outer cover, such as the seat cushion cover or backrest cover, which is fitted onto the filling tube 7, onto one of the filling tubes 7. This replaces the manual handling of the outer cover for filling operations, thereby reducing the labor intensity of the operator and improving the comfort and safety of the operation.

[0029] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A cotton filling device for sofa production, comprising a cotton storage bin (1), a fan (2) disposed on one side of the cotton storage bin (1), and a material conveying pipe (3) disposed between the cotton storage bin (1) and the fan (2), characterized in that: The blower (2) is provided with a Y-shaped three-way pipe (4) on the side away from the cotton storage bin (1). One end of the three-way pipe (4) is installed on the output end of the blower (2). A baffle plate (5) is provided inside the three-way pipe (4). One end of the baffle plate (5) is in contact with the inner wall of the three-way pipe (4) near the blower (2). A rotating shaft (6) is provided at the other end of the baffle plate (5). A sleeve hole is opened at the corner of the three-way pipe (4). The rotating shaft (6) is rotated and fitted into the sleeve hole. Two cotton filling pipes (7) are provided on the side of the three-way pipe (4) away from the cotton storage bin (1). The two cotton filling pipes (7) are respectively installed on the other two ends of the three-way pipe (4). A clamping device is provided on each of the two cotton filling pipes (7). The clamping device includes a clamp (8) on the filling tube (7), two arc-shaped claws (9) on the side of the clamp (8) away from the three-way pipe (4), clamping rods (10) on both sides of the claws (9), and a telescopic cylinder (11) on one side of the clamping rods (10). The telescopic cylinder (11) is installed on the clamp (8), and the telescopic end of the telescopic cylinder (11) is connected to the clamping rod (10). One end of the clamping rod (10) is hinged to the clamp (8), and the other end of the clamping rod (10) is connected to the claws (9). The claws (9) are fitted on the filling tube (7), and the clamp (8) clamps and fixes the filling tube (7).

2. The cotton filling device for sofa production according to claim 1, characterized in that: The clamping rod (10) is provided with a fixing rod (12) at the end away from the clamping claw (9). One end of the fixing rod (12) is installed on one end of the clamping rod (10). A fixing block (13) made of elastic material is provided on one side of the fixing rod (12). The two sides of the fixing block (13) are in contact with the fixing rod (12) installed on one clamping rod (10) and the other clamping rod (10), respectively. A support rod (14) is provided on one side of the three-way pipe (4). The support rod (14) is parallel to the baffle plate (5). One end of the support rod (14) is installed on the end of the rotating shaft (6). A connecting rod (15) is provided on the other end of the support rod (14). The two ends of the connecting rod (15) are installed on the support rod (14) and the fixing block (13), respectively. A handle (16) is provided on the other end of the support rod (14). The bottom end of the handle (16) is installed on the support rod (14).

3. The device for filling the sofa production with cotton according to claim 1, characterized by the fact that: The clamp rod adopts an n-shaped structure. The clamp rod (10) has a slot (17) on the side near the clamp (8). A round block (18) is fitted inside the slot (17). The diameter of the round block (18) matches the width of the slot (17). A bracket (19) is provided on the side of the round block (18) away from the filling tube (7). The bracket (19) is connected to the round block (18). The bracket (19) is installed on the telescopic end of the telescopic cylinder (11). A hinge rod (20) is provided on the clamp (8). The hinge rod (20) is located between the bracket (19) and the filling tube (7). One end of the hinge rod (20) is installed on the outer wall of the clamp (8). One end of the clamp rod (10) is hinged to the clamp (8) through the hinge rod (20).

4. The cotton filling device for sofa production according to claim 1, characterized in that: The clamp (9) is provided with a fixing plate (21) at both ends. One end of the fixing plate (21) is installed on the outer wall of the clamp (9), and the end of the clamp rod (10) away from the three-way pipe (4) is installed on the fixing plate (21). The clamp (9) is provided with a pad (22) made of elastic material. The middle part of the pad (22) is installed on the inner wall of the clamp (9), and the side part of the pad (22) is installed on the fixing plate (21).

5. The device for filling the sofa production with cotton according to claim 1, characterized by the fact that: The cotton filling tube (7) is inclined at one end away from the three-way tube (4) and has a guide groove (23). The width of the guide groove (23) gradually increases from top to bottom.

6. The cotton filling device for sofa production according to claim 1, characterized in that: The cotton storage bin (1) is provided with observation slots on both sides. An observation window (24) made of transparent material is provided in the observation slot. The shape and structure of the observation window (24) match the structure of the observation slot. The observation window (24) is installed on the cotton storage bin (1). A feed pipe (25) is provided on the cotton storage bin (1). One end of the feed pipe (25) is installed at the top of the cotton storage bin (1). The feed pipe (25) is connected to the cotton storage bin (1).

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