Self-leveling cotton feeding device

Abstract

This application belongs to the field of textile machinery technology and discloses a self-regulating and leveling cotton feeding device, including a frame, rotating rollers, a conveyor belt, and a drive unit. Two vertical plates are horizontally spaced on the frame, with a fixed plate between them. A reciprocating plate slides horizontally between the two vertical plates, its surface parallel to the fixed plate. A fixed pipe is positioned between the upper sides of the two vertical plates, with a discharge port on its lower side and a feed port on its upper side. A feed hopper is mounted on the fixed pipe. A separating roller rotates between the two vertical plates, with several separating plates spaced circumferentially on it. A power assembly is mounted on one of the vertical plates. The power assembly drives the separating roller and separating plates to rotate, conveying the fibers and preventing them from getting stuck. The power assembly drives the reciprocating plate to slide back and forth, pushing the fibers and ensuring movement between them, thereby preventing fiber accumulation and jamming between the reciprocating plate and the fixed plate, and ensuring production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of textile machinery technology, and in particular to a self-regulating and leveling cotton feeding device. Background Technology

[0002] With the rapid development of nonwoven fabrics, the application fields of various fibers have also expanded. In the production of nonwoven fabrics, various fiber raw materials undergo mixing and opening treatments. Fiber clumps and clusters in the raw materials are broken down, and the various fibers are uniformly mixed. The opened and mixed fibers are then fed into a cotton feeding system, which uniformly and stably outputs cotton fibers for the next process. The cotton feeding device is the connecting equipment between the cotton cleaning machine and the carding machine. Its main function is to process the cotton fibers from the cotton cleaning process into uniform and stable cotton fibers and feed them into the carding machine.

[0003] Currently, existing cotton feeding devices, when used with fiber raw materials with high moisture regain, experience a significant increase in surface moisture content, which in turn increases the friction between fibers, greatly reducing fiber flowability. This can easily cause the fibers to jam during the output process, requiring manual cleaning and reducing production efficiency. Utility Model Content

[0004] To solve the above problems, this utility model provides a self-adjusting and uniform cotton feeding device.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a self-adjusting and leveling cotton feeding device, including a frame, on which two rotating rollers are horizontally rotatably arranged at intervals, the two rotating rollers are connected by a conveyor belt, a drive unit is provided on the frame to drive one of the rotating rollers to rotate, two vertical plates are horizontally spaced on the frame, a fixed plate is provided between the two vertical plates, and a reciprocating plate is horizontally slidably arranged between the two vertical plates, the surface of the reciprocating plate is parallel to the surface of the fixed plate, a fixed pipe is provided between the upper sides of the two vertical plates, a discharge port corresponding to the area between the reciprocating plate and the fixed plate is opened on the lower side of the fixed pipe, a feed port is opened on the upper side of the fixed pipe, a feed hopper is provided on the fixed pipe at the feed port, a dividing roller is rotatably arranged concentrically with the fixed pipe between the two vertical plates, a plurality of dividing plates are circumferentially spaced on the dividing roller, and a power component is provided on one of the vertical plates to drive the dividing roller to rotate and the reciprocating plate to slide back and forth.

[0006] By adopting the above technical solution, a frame, rotating rollers, conveyor belt, reciprocating plate, separating rollers, and power assembly are set up. Fibers are placed into the feed hopper, and the power assembly drives the separating rollers and separating plate to rotate. Fibers enter the fixed pipe through the feed inlet. The rotating separating rollers and separating plate transport the fibers, which are then discharged from the outlet and accumulate between the reciprocating plate and the fixed plate, preventing fiber jamming and controlling the fiber feeding speed. The drive unit drives the rotating rollers to rotate, causing the conveyor belt to move and transport the accumulated fibers outward. Because the distance between the underside of the fixed plate and the conveyor belt is fixed, the thickness of the fibers transported by the conveyor belt is uniform. Simultaneously, the power assembly drives the separating rollers to rotate and the reciprocating plate to slide back and forth, pushing the fibers and ensuring movement between them. This prevents fiber jamming between the reciprocating plate and the fixed plate, ensuring production efficiency.

[0007] Furthermore, an installation frame is provided between the two upright plates, and four sliding holes arranged in a rectangular array are provided on the installation frame. Sliding rods are slidably disposed in the sliding holes, and the ends of several of the sliding rods are connected to the reciprocating plate.

[0008] By adopting the above technical solution, an installation frame, a sliding rod, and a reciprocating plate are set up. The sliding rod slides in the sliding hole to ensure the stability of the reciprocating plate sliding.

[0009] Furthermore, the power assembly includes a reciprocating unit, a linkage unit, and a power unit. The reciprocating unit includes a rotating shaft that is horizontally rotatably disposed between two vertical plates. Two cams are fixedly sleeved on the rotating shaft. The wheel surface of the cams contacts the plate surface of the reciprocating plate on the side away from the fixed plate. A baffle is provided at the end of the sliding rod away from the reciprocating plate. A compression spring is sleeved on the rod body of the sliding rod located between the baffle and the mounting frame.

[0010] By adopting the above technical solution, a rotating shaft, a cam, a baffle, and a compression spring are set up. When the rotating shaft rotates, it drives the cam to rotate. When the protruding part of the cam contacts the surface of the reciprocating plate, it pushes the reciprocating plate to move, which in turn drives the sliding rod and the baffle to move. The compression spring is compressed. When the protruding part of the cam separates from the surface of the reciprocating plate, the compression spring pushes the baffle, sliding rod, and reciprocating plate back to their original positions under the action of elastic force. This process is repeated, and the reciprocating plate moves back and forth.

[0011] Furthermore, both ends of the distributing roller are provided with roller shafts, the roller shafts pass through the vertical plate and are rotatably connected to the vertical plate, the linkage unit includes a drive sprocket fixedly sleeved on one of the roller shafts, one end of the rotating shaft passes through the vertical plate and is provided with a driven sprocket, the driven sprocket and the drive sprocket are connected by a chain.

[0012] By adopting the above technical solution, a roller shaft, a drive sprocket, and a driven sprocket are set up so that when the material distribution roller rotates, it drives the roller shaft to rotate, which in turn drives the drive sprocket to rotate. Since the driven sprocket and the drive sprocket are connected by a chain, the rotation of the driven sprocket drives the rotating shaft to rotate.

[0013] Furthermore, the power unit includes a mounting bracket disposed on one of the vertical plates, on which a power motor is horizontally disposed, and the output shaft of the power motor is connected to one of the roller shafts.

[0014] By adopting the above technical solution, a mounting frame, a drive motor, and rollers are set up, and the drive motor drives the rollers and the distributing rollers to rotate.

[0015] Furthermore, a pressure roller is rotatably arranged between the two upright plates, and the roller surface of the pressure roller is tangent to the side of the reciprocating plate that is near the reciprocating plate of the fixed plate.

[0016] Furthermore, both ends of the pressure roller are concentrically provided with trunnions, which pass through the vertical plate and are rotatably connected to the vertical plate. One of the trunnions passes through the vertical plate and is provided with a driven synchronous pulley. A driving synchronous pulley is fixedly sleeved on the roller shaft. The driving synchronous pulley and the driven synchronous pulley are connected by a synchronous belt.

[0017] By adopting the above technical solution, a trunnion, a driven synchronous pulley, and a driving synchronous pulley are set up. When the roller rotates, it drives the driving synchronous pulley to rotate. Since the driving synchronous pulley and the driven synchronous pulley are connected by a synchronous belt, the rotation of the driven synchronous pulley drives the trunnion and the pressure roller to rotate, thus preventing the fiber from getting stuck on the underside of the fixed plate.

[0018] Furthermore, the drive unit includes a drive motor horizontally mounted on the frame, and the output shaft of the drive motor is connected to one of the rotating rollers.

[0019] By adopting the above technical solution, a drive motor is set up, which drives the rotating roller to rotate, thereby driving the conveyor belt to rotate.

[0020] Furthermore, a mounting plate is provided on the lower side of the reciprocating plate, and a plurality of bristles are provided on the lower side of the mounting plate, with the lower ends of the bristles contacting the upper surface of the transmission belt.

[0021] By adopting the above technical solution, an installation plate and brush bristles are set up. The brush bristles block the fibers and prevent the fibers from moving to the side of the reciprocating plate away from the fixed plate.

[0022] Furthermore, the frame is rotatably provided with a number of horizontally spaced support rollers, all of which are located inside the conveyor belt and in contact with the conveyor belt.

[0023] In summary, this utility model has the following beneficial effects: This application includes a frame, rotating rollers, a conveyor belt, a reciprocating plate, a separating roller, and a power assembly. Fibers are placed into the feed hopper, and the power assembly drives the separating rollers and separating plate to rotate. The fibers enter the fixed pipe through the feed inlet. The rotating separating rollers and separating plate transport the fibers, which are then discharged from the outlet and accumulate between the reciprocating plate and the fixed plate, preventing fiber jamming and controlling the fiber feeding speed. The drive unit drives the rotating rollers to rotate, causing the conveyor belt to move and transport the accumulated fibers outwards. Because the distance between the lower side of the fixed plate and the conveyor belt is fixed, the thickness of the fibers transported by the conveyor belt is uniform. Simultaneously, the power assembly drives the reciprocating plate to slide back and forth, pushing the fibers and ensuring movement between them, thereby preventing fiber jamming between the reciprocating plate and the fixed plate and ensuring production efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0025] Figure 2 This is a schematic diagram of the overall structure from another angle of an embodiment of the present utility model;

[0026] Figure 3 This is a structural schematic diagram of the mounting frame, fixing plate, and reciprocating plate in an embodiment of this utility model;

[0027] Figure 4 yes Figure 3 Enlarged view of part A.

[0028] In the diagram: 10. Frame; 11. Rotating roller; 12. Conveyor belt; 13. Support roller; 20. Drive unit; 21. Drive motor; 30. Vertical plate; 31. Fixed plate; 32. Reciprocating plate; 33. Fixed pipe; 34. Discharge port; 35. Feed port; 36. Feed hopper; 37. Distributing roller; 38. Distributing plate; 40. Mounting frame; 41. Sliding rod; 50. Reciprocating unit; 51. Rotating shaft; 52. Cam; 53. Baffle; 54. Compression spring; 60. Linkage unit; 61. Driven sprocket; 62. Chain; 70. Power unit; 71. Mounting frame; 72. Power motor; 80. Pressure roller; 81. Driven synchronous pulley; 82. Driven synchronous pulley; 83. Synchronous belt; 90. Mounting plate; 91. Brush. Detailed Implementation

[0029] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0030] like Figure 1-4 As shown in the embodiment of this application, a self-adjusting and leveling cotton feeding device is disclosed, including a frame 10, rotating rollers 11, reciprocating plates 32, distributing rollers 37, and a power assembly. There are two rotating rollers 11, horizontally rotatable on the frame 10 and spaced apart. The two rotating rollers 11 are connected by a conveyor belt 12. A drive unit 20 for driving one of the rotating rollers 11 is provided on the frame 10. Two vertical plates 30 are horizontally spaced on the frame 10, with a fixed plate 31 between them. The lower side of the fixed plate 31 is a certain distance from the upper surface of the conveyor belt 12. The reciprocating plate 32 is horizontally slidably disposed between the two vertical plates 30, with its surface parallel to the surface of the fixed plate 31. A fixed pipe 33 is provided between the upper sides of the two upright plates 30. A discharge port 34 is opened on the lower side of the fixed pipe 33, corresponding to the area between the reciprocating plate 32 and the fixed plate 31. A feed port 35 is opened on the upper side of the fixed pipe 33. A feed hopper 36 is provided on the fixed pipe 33 at the feed port 35. A separating roller 37 is rotatably arranged between the two upright plates 30 and concentrically with the fixed pipe 33. Several separating plates 38 are circumferentially spaced on the separating roller 37. A power assembly is installed on one of the upright plates 30 to drive the separating roller 37 to rotate and the reciprocating plate 32 to slide back and forth. Fibers are placed into the feed hopper 36. The power assembly drives the separating roller 37 and the separating plates 38 to rotate. The fibers enter the fixed pipe 33 through the feed port 35. The rotating separating roller 37 and the separating plates 38 convey the fibers. The fibers are discharged from the discharge port 34 and accumulate between the reciprocating plate 32 and the fixed plate 31, preventing fiber jamming and controlling the rotation speed of the separating roller 37 to control the fiber feeding speed. The drive unit 20 drives the rotating roller 11 to rotate, which in turn moves the conveyor belt 12 to transport the accumulated fibers outward. Since the distance between the lower side of the fixed plate 31 and the conveyor belt 12 is fixed, the thickness of the fibers transported by the conveyor belt 12 is uniform. The power unit drives the distribution roller 37 to rotate while simultaneously driving the reciprocating plate 32 to slide back and forth, pushing the fibers and ensuring movement between them. This prevents fiber accumulation and jamming between the reciprocating plate 32 and the fixed plate 31, thus ensuring production efficiency.

[0031] Specifically, a mounting plate 90 is provided on the lower side of the reciprocating plate 32, and several bristles 91 are provided on the lower side of the mounting plate 90. The lower ends of the bristles 91 contact the upper surface of the transmission belt, and the bristles 91 block the fibers, preventing the fibers from moving to the side of the reciprocating plate 32 away from the fixed plate 31. A rubber sheet (not shown in the figure) is provided between the upper side of the reciprocating plate 32 and the edge near the discharge port 34, to prevent the fibers falling from the discharge port 34 from falling on the side of the reciprocating plate 32 away from the fixed plate 31, and the rubber sheet can deform without affecting the reciprocating motion of the reciprocating plate 32. A mounting frame 40 is provided between the two upright plates 30, and four sliding holes arranged in a rectangular array are opened on the mounting frame 40. Sliding rods 41 are slidably installed in the sliding holes, and the ends of several sliding rods 41 are connected to the reciprocating plate 32. The sliding rods 41 move synchronously with the reciprocating plate 32, and the sliding rods 41 slide in the sliding holes to ensure the stability of the sliding of the reciprocating plate 32.

[0032] The drive unit 20 includes a drive motor 21 horizontally mounted on the frame 10. The output shaft of the drive motor 21 is connected to one of the rotating rollers 11. The drive motor 21 drives the rotating roller 11 to rotate, thereby driving the conveyor belt 12 to rotate. Several horizontally spaced support rollers 13 are rotatably mounted on the frame 10. The support rollers 13 are all located inside the conveyor belt 12 and in contact with the conveyor belt 12, providing support for the conveyor belt 12.

[0033] In setup, the power assembly includes a reciprocating unit 50, a linkage unit 60, and a power unit 70. The reciprocating unit 50 includes a horizontally rotatable rotating shaft 51 positioned between two vertical plates 30. Two cams 52 are fixedly mounted on the rotating shaft 51. The wheel surfaces of the cams 52 contact the plate surface of the reciprocating plate 32 away from the fixed plate 31. A baffle 53 is provided at the end of the sliding rod 41 away from the reciprocating plate 32. A compression spring 54 is mounted on the rod body of the sliding rod 41 located between the baffle 53 and the mounting frame 40. When the rotating shaft 51 rotates, it drives the cams 52 to rotate. When the protruding part of the cam 52 contacts the plate surface of the reciprocating plate 32, it pushes the reciprocating plate 32 to move, causing the sliding rod 41 and the baffle 53 to move, and the compression spring 54 is compressed. When the protruding part of the cam 52 separates from the plate surface of the reciprocating plate 32, the compression spring 54 pushes the baffle 53, the sliding rod 41, and the reciprocating plate 32 to return to their original positions under the action of elastic force. This process is repeated, and the reciprocating plate 32 reciprocates.

[0034] Both ends of the distributing roller 37 are provided with roller shafts, which pass through the vertical plate 30 and are rotatably connected to the vertical plate 30. The linkage unit 60 includes a drive sprocket fixedly sleeved on one of the roller shafts. One end of the rotating shaft 51 passes through the vertical plate 30 and is provided with a driven sprocket 61. The driven sprocket 61 and the drive sprocket are connected by a chain 62, so that when the distributing roller 37 rotates and drives the roller shaft to rotate, it drives the drive sprocket to rotate. Since the driven sprocket 61 and the drive sprocket are connected by a chain 62, the rotation of the driven sprocket 61 drives the rotating shaft 51 to rotate.

[0035] The power unit 70 includes a mounting frame 71 mounted on one of the vertical plates 30. A power motor 72 is horizontally mounted on the mounting frame 71. The output shaft of the power motor 72 is connected to one of the roller shafts. The drive motor 21 drives the roller shaft and the distributing roller 37 to rotate.

[0036] In a specific configuration, a pressure roller 80 is rotatably mounted between the two vertical plates 30, with the roller core of the pressure roller 80 parallel to the roller core of the distribution roller 37. The pressure roller 80 is located on the lower side of the fixed plate 31, and the roller surface of the pressure roller 80 is tangent to the side of the fixed plate 31 near the reciprocating plate 32. Both ends of the pressure roller 80 are concentrically equipped with trunnions, and the pressure roller 80 and the trunnions rotate synchronously. The trunnion passes through the vertical plate 30 and is rotatably connected to the vertical plate 30. One of the trunnions passes through the vertical plate 30 and is provided with a driven synchronous pulley 81. A driving synchronous pulley 82 is fixedly sleeved on the roller shaft. The driving synchronous pulley 82 and the driven synchronous belt 83 are connected by a synchronous belt 83. When the roller shaft rotates, it drives the driving synchronous pulley 82 to rotate. Since the driving synchronous pulley 82 and the driven synchronous belt 83 are connected by a synchronous belt 83, the rotation of the driven synchronous pulley 81 drives the trunnion and the pressure roller 80 to rotate, thus preventing the fiber from getting stuck on the underside of the fixed plate 31.

[0037] One of the upright plates 30 has two vertically spaced mounting holes, each housing an infrared ranging sensor (not shown in the diagram). The sensor head of the infrared ranging sensor faces the other upright plate 30. When there are no fibers between the fixed plate 31 and the reciprocating plate 32, the infrared ranging sensor measures the distance between the two upright plates 30. When there are fibers between the fixed plate 31 and the reciprocating plate 32, the measured data of the infrared ranging sensor changes. When the lower infrared ranging sensor measures the distance between the upright plates 30, the speed of the drive motor 72 is increased to prevent material shortage. When the upper infrared ranging sensor measures a different distance than the distance between the upright plates 30, the speed of the drive motor 72 is decreased to prevent excessive fiber accumulation between the reciprocating plate 32 and the fixed plate 31.

[0038] The self-adjusting and leveling cotton feeding device in this embodiment operates as follows: Fibers are placed into the feed hopper 36, and the drive motor 21 and power motor 72 are started. The drive motor 21 drives the rotating roller 11 to rotate, thereby driving the conveyor belt 12 to rotate. The power motor 72 drives the distribution roller 37, distribution plate 38, drive sprocket, and drive synchronous pulley 82 to rotate. Fibers enter the fixed pipe 33 through the feed inlet 35. The rotating distribution roller 37 and distribution plate 38 convey the fibers, which are discharged from the outlet 34 and accumulate between the reciprocating plate 32 and the fixed plate 31. The rotation of the drive sprocket drives the driven sprocket 61, rotating shaft 51, and cam 52 to rotate. Under the action of the compression spring 54, the reciprocating plate 32 reciprocates, pushing the fibers and ensuring movement between them. This prevents fiber jamming between the reciprocating plate 32 and the fixed plate 31, ensuring production efficiency. The rotation of the active synchronous pulley 82 drives the driven synchronous pulley 81 and the pressure roller 80 to rotate, preventing the fibers from getting stuck on the underside of the fixed plate 31.

[0039] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A self-adjusting and leveling cotton feeding device, characterized in that: The system includes a frame (10), on which two horizontally rotatable rotating rollers (11) are arranged at intervals. The two rotating rollers (11) are connected by a conveyor belt (12). A drive unit (20) for driving one of the rotating rollers (11) is provided on the frame (10). Two horizontally spaced vertical plates (30) are arranged on the frame (10). A fixed plate (31) is provided between the two vertical plates (30). A reciprocating plate (32) is also horizontally slidably arranged between the two vertical plates (30). The surface of the reciprocating plate (32) is parallel to the surface of the fixed plate (31). A space is provided between the upper sides of the two vertical plates (30). A fixed tube (33) is provided, and a discharge port (34) corresponding to the area between the reciprocating plate (32) and the fixed plate (31) is opened on the lower side of the fixed tube (33). A feed port (35) is opened on the upper side of the fixed tube (33). A feed hopper (36) is provided on the fixed tube (33) at the feed port (35). A material distribution roller (37) is rotatably arranged between the two vertical plates (30) and concentrically arranged with the fixed tube (33). A number of material distribution plates (38) are arranged circumferentially on the material distribution roller (37). A power component is provided on one of the vertical plates (30) to drive the material distribution roller (37) to rotate and the reciprocating plate (32) to slide back and forth.

2. The self-adjusting and leveling cotton feeding device according to claim 1, characterized in that: An installation frame (40) is provided between the two upright plates (30). The installation frame (40) has four sliding holes arranged in a rectangular array. Sliding rods (41) are slidably disposed in the sliding holes. The ends of several sliding rods (41) are connected to the reciprocating plate (32).

3. The self-adjusting and leveling cotton feeding device according to claim 2, characterized in that: The power assembly includes a reciprocating unit (50), a linkage unit (60), and a power unit (70). The reciprocating unit (50) includes a rotating shaft (51) that is horizontally rotatably disposed between two upright plates (30). Two cams (52) are fixedly sleeved on the rotating shaft (51). The wheel surface of the cams (52) contacts the plate surface of the reciprocating plate (32) on the side away from the fixed plate (31). A baffle (53) is provided at the end of the sliding rod (41) away from the reciprocating plate (32). A compression spring (54) is sleeved on the rod body of the sliding rod (41) located between the baffle (53) and the mounting frame (40).

4. The self-adjusting and leveling cotton feeding device according to claim 3, characterized in that: The material distribution roller (37) is provided with roller shafts at both ends. The roller shafts pass through the vertical plate (30) and are rotatably connected to the vertical plate (30). The linkage unit (60) includes a drive sprocket fixedly sleeved on one of the roller shafts. One end of the rotating shaft (51) passes through the vertical plate (30) and is provided with a driven sprocket (61). The driven sprocket (61) and the drive sprocket are connected by a chain (62).

5. The self-adjusting and leveling cotton feeding device according to claim 4, characterized in that: The power unit (70) includes a mounting bracket (71) disposed on one of the vertical plates (30), and a power motor (72) is horizontally disposed on the mounting bracket (71). The output shaft of the power motor (72) is connected to one of the roller shafts.

6. The self-adjusting and leveling cotton feeding device according to claim 5, characterized in that: A pressure roller (80) is rotatably arranged between the two upright plates (30), and the roller surface of the pressure roller (80) is tangent to the side of the reciprocating plate (32) and the side of the fixed plate (31) near the reciprocating plate (32).

7. The self-adjusting and leveling cotton feeding device according to claim 6, characterized in that: Both ends of the pressure roller (80) are concentrically provided with trunnions. The trunnions pass through the vertical plate (30) and are rotatably connected to the vertical plate (30). One of the trunnions passes through the vertical plate (30) and is provided with a driven synchronous pulley (81). A driving synchronous pulley (82) is fixedly sleeved on the roller shaft. The driving synchronous pulley (82) and the driven synchronous pulley (81) are connected by a synchronous belt (83).

8. The self-adjusting and leveling cotton feeding device according to claim 1, characterized in that: The drive unit (20) includes a drive motor (21) horizontally mounted on the frame (10), and the output shaft of the drive motor (21) is connected to one of the rotating rollers (11).

9. The self-adjusting and leveling cotton feeding device according to claim 1, characterized in that: A mounting plate (90) is provided on the lower side of the reciprocating plate (32), and a plurality of bristles (91) are provided on the lower side of the mounting plate (90). The lower ends of the bristles (91) are in contact with the upper surface of the transmission belt.

10. The self-adjusting and leveling cotton feeding device according to claim 1, characterized in that: The frame (10) is rotatably provided with a number of horizontally spaced support rollers (13), and the support rollers (13) are all located inside the conveyor belt (12) and in contact with the conveyor belt (12).

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