Yarn pressing mechanism for colored spun yarn spinning machine

Abstract

The invention discloses a yarn pressing mechanism for a colored spun yarn spinning machine, and relates to the technical field of spinning machine structures. The device comprises a mounting box, a fixed box is movably inserted into the top of the mounting box, two symmetrically arranged mounting racks are fixedly arranged in the fixed box, the mounting racks are integrally arranged in an inverted U shape, and wire pressing rollers are rotatably mounted in the middles of the bottoms of the two ends of the mounting racks; when the wire pressing roller rotates, power transmission is matched with a transmission structure to drive a movable plate, a piston rod and a piston head to do piston motion in a piston pipe, lubricating oil in an oil storage box is automatically injected into a bearing for lubrication, and the wire pressing roller can be timely and continuously lubricated in the rotating process; and the risk that the bearing is damaged due to lack of lubrication is effectively reduced, the service life of the bearing is prolonged, stable rotation of parts such as the line pressing roller is further guaranteed, and the occurrence probability of faults such as unsmooth rotation, vibration and noise caused by the bearing problem is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of spinning machine structures, in particular to a thread pressing mechanism for a color spinning machine. Background Art

[0002] Colored yarn is a yarn with a unique color mixing effect made by fully mixing two or more fibers of different colors. Colored yarn can achieve a hazy three-dimensional effect and texture that cannot be achieved by white dyeing. During the working process of the spinning machine, it is generally necessary to press the spinning line to ensure the stability of the yarn during winding; After long-term use of the current crimping mechanism, the surface of the crimping roller may be worn, resulting in poor crimping effect, yarn skipping, loose yarn and other problems. However, the current crimping roller installation method is fixed by bearings, which makes it very troublesome to disassemble and replace it later, affecting the overall replacement efficiency. At the same time, the bearing is a key component that supports the rotating parts in the crimping device. If the bearing is damaged, the crimping roller and other parts will not rotate smoothly, causing vibration and noise, and even unable to work normally.

[0003] In view of the above problems, the inventor proposes a thread pressing mechanism for a color-spinning yarn spinning machine to solve the above problems. Summary of the invention

[0004] In order to solve the above problems, the object of the present invention is to provide a thread pressing mechanism for a color spinning machine.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: a wire pressing mechanism for a color spinning machine, comprising a mounting box, a fixed box is movably inserted on the top of the mounting box, two symmetrically arranged mounting frames are fixedly arranged inside the fixed box, and the mounting frame is arranged in an inverted U shape as a whole, and a wire pressing roller is rotatably installed at the middle of the bottom of both ends of the mounting frame, and mounting shafts are fixedly arranged at both ends of the wire pressing roller, and bearings corresponding to the mounting shafts are rotatably arranged at the bottom of both ends of the mounting frame, a connecting shaft is fixedly arranged at the inner ring of the rotating shaft, and a connecting assembly is arranged between the connecting shaft and the mounting shaft, and a conveying hose is fixedly installed on the opposite sides of the two ends of the mounting frame through a fixed block, an oiling nozzle is installed at the bottom of the conveying hose, and an oil storage box is fixedly installed on the lower surface of the top of the mounting frame.

[0006] Preferably, a box body is fixedly provided on the top of the upper surface of the oil storage box, and the top of the box body is fixedly provided on the lower surface of the mounting frame, a horizontally arranged movable plate is provided at the inner middle end of the box body, a rectangular groove is penetrated through the middle end of the movable plate, an arc groove is provided at the diagonal of the rectangular groove, a vertically arranged rotating rod is fixedly provided at the middle end of the rectangular groove, a Y-shaped pushing block is fixedly provided on the top of the rotating rod, and the end of the pushing block can be abutted against the rectangular groove, piston rods are fixedly provided at both ends of the movable plate, a piston head is fixedly provided at one end of the piston rod away from the movable plate, piston tubes are fixedly provided at both ends of the box body, the ends of the piston rod and the piston head away from the box body are inserted in the piston tube, and the end of the delivery hose away from the oil filling nozzle is inserted in the piston tube.

[0007] Preferably, an oil delivery pipe is connected to the side wall of the oil storage box through the pump body, and one end of the oil delivery pipe away from the oil storage box passes through the box body and is inserted into the piston tube and is installed with a one-way valve.

[0008] Preferably, the top of the rotating shaft is rotatably inserted in the mounting frame and is fixed with a first gear, a vertically arranged first transmission shaft is rotatably provided in the mounting frame near the rotating shaft, a second gear meshing with the first gear is fixedly provided on the first transmission shaft, a horizontally arranged cross bar is inserted at the top of the mounting frame near the first transmission shaft, one end of the cross bar is connected to the first transmission shaft by two meshing bevel gears, a second transmission shaft is fixedly provided on the end of the connecting shaft close to the cross bar away from the wire pressing roller, and the second transmission shaft and the first transmission shaft are connected by belt drive; the first gear and the second gear are respectively a large gear and a small gear.

[0009] Preferably, the connecting component includes a card slot, which is provided at the end of the mounting shaft, a mounting slot is provided at the end of the connecting tube away from the mounting frame, a protrusion is fixedly provided at the end of the connecting shaft away from the mounting frame, a movable rod is movably inserted at the end of the protrusion, a pulling block is fixedly provided at the end of the movable rod away from the protrusion, a card block is fixedly provided at the end of the movable rod located inside the protrusion, the card block can be inserted in the card slot, and a return spring is sleeved on the movable rod between the card block and the protrusion; the length of the mounting slot is longer than the distance from the card slot to the end of the mounting shaft.

[0010] Preferably, a top plate is fixedly provided on two opposite sides of the top of the fixed box, a long plate is fixedly provided on the upper surface of the installation box just below the top plate, a screw rod is rotatably provided in the long plate, the threads at both ends of the screw rod are opposite, sliders are slidably provided at both ends of the long plate, the sliders are threadedly inserted in the ends of the screw rod, and a top rod is hingedly provided between the slider and the top plate; a driving motor is fixedly installed at one end of the long plate, and the output end of the driving motor is coaxially fixed on the screw rod.

[0011] Preferably, two symmetrically arranged limiting rollers are installed inside the installation box, and both ends of the limiting rollers are rotatably arranged on the inner wall of the installation box, and the pressing roller is arranged between two adjacent limiting rollers.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention adopts a detachable connection method in which the card block and the card slot cooperate. Compared with the traditional method of only relying on the bearing for fixed connection, when the crimping roller is worn and needs to be replaced, there is no need for complicated operations such as disassembling the bearing. It is only necessary to pull the pull block to disengage the card block from the card slot, and the installation shaft and the connecting shaft can be easily separated, so as to realize the rapid disassembly of the crimping roller, which significantly improves the replacement efficiency, reduces the equipment downtime, and improves the overall production continuity; 2. The power transmission and transmission structure of the wire-pressing roller during rotation in the present invention drives the movable plate, the piston rod and the piston head to perform piston movement in the piston tube, so that the lubricating oil in the oil storage box is automatically injected into the bearing for lubrication. The wire-pressing roller can be lubricated in a timely and continuous manner during its rotation, which effectively reduces the risk of bearing damage due to lack of lubrication, extends the service life of the bearing, and further ensures the stable rotation of the wire-pressing roller and other components, and reduces the probability of failures such as uneven rotation, vibration and noise due to bearing problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 It is a schematic diagram of the internal structure of the installation box of the present invention.

[0016] Figure 3 It is a schematic diagram of the structure of the mounting frame of the present invention.

[0017] Figure 4 It is a schematic diagram of the internal structure of the mounting frame of the present invention.

[0018] Figure 5 It is a schematic diagram of the movable plate structure of the present invention.

[0019] Figure 6 This is a schematic diagram of the shaft installation structure of the present invention.

[0020] Figure 7 It is a schematic diagram of the top plate structure of the present invention.

[0021] In the figure: 1. installation box; 12. fixed box; 13. installation frame; 14. crimping roller; 15. installation shaft; 16. bearing; 17. connecting shaft; 2. box body; 21. movable plate; 22. rectangular groove; 23. arc groove; 24. push block; 25. rotating shaft; 26. piston tube; 27. piston rod; 28. piston head; 3. oil storage box; 31. oil pipeline; 32. delivery hose; 33. oil injection nozzle; 4. cross bar; 41. first transmission shaft; 42. first gear; 43. second gear; 44. belt; 45. second transmission shaft; 5. installation groove; 51. convex block; 52. movable rod; 53. pull block; 54. reset spring; 55. block; 56. slot; 6. long board; 61. top plate; 62. screw rod; 63. slider; 64. top rod; 65. drive motor; 7. limit roller. DETAILED DESCRIPTION

[0022] The following will be combined with the 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 described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] like Figure 1-7 As shown, the present invention provides a wire pressing mechanism for a color spinning machine, comprising a mounting box 1, a fixed box 12 is movably inserted at the top of the mounting box 1, two symmetrically arranged mounting frames 13 are fixedly arranged inside the fixed box 12, the mounting frame 13 is arranged in an inverted U shape as a whole, a wire pressing roller 14 is rotatably installed at the middle of the bottom of both ends of the mounting frame 13, mounting shafts 15 are fixedly arranged at both ends of the wire pressing roller 14, bearings 16 corresponding to the mounting shafts 15 are rotatably provided at the bottom of both ends of the mounting frame 13, a connecting shaft 17 is fixedly provided at the inner ring of the rotating shaft 25, a connecting assembly is provided between the connecting shaft 17 and the mounting shaft 15, a conveying hose 32 is fixedly installed on the opposite sides of the two ends of the mounting frame 13 through a fixed block, an oiling nozzle 33 is installed at the bottom of the conveying hose 32, and an oil storage box 3 is fixedly installed on the lower surface of the top of the mounting frame 13. It is worth noting that the bottom of the mounting box 1 is arranged in a V shape, which is convenient for centralized collection of the remaining lubricating oil and subsequent unified treatment.

[0024] A box body 2 is fixedly provided on the top of the upper surface of the oil storage box 3, and the top of the box body 2 is fixedly provided on the lower surface of the mounting frame 13. A horizontally arranged movable plate 21 is provided at the middle end of the inner part of the box body 2, and a rectangular groove 22 is penetrated through the middle end of the movable plate 21, and an arc groove 23 is provided at the diagonal of the rectangular groove 22. A vertically arranged rotating rod is fixedly provided at the middle end of the rectangular groove 22, and a Y-shaped pushing block 24 is fixedly provided on the top of the rotating rod, and the end of the pushing block 24 can be abutted against the rectangular groove 22. Piston rods 27 are fixedly provided at both ends of the movable plate 21, and a piston head 28 is fixedly provided at one end of the piston rod 27 away from the movable plate 21, and piston tubes 26 are fixedly provided at both ends of the box body 2, and the ends of the piston rod 27 and the piston head 28 away from the box body 2 are inserted in the piston tube 26, and the end of the delivery hose 32 away from the oiling nozzle 33 is inserted in the piston tube 26.

[0025] By adopting the above technical solution, when the crimping roller 14 rotates, the movable plate 21 will move back and forth repeatedly, so that the piston rod 27 and the piston head 28 at the end of the movable plate 21 perform piston motion in the piston tube 26, and the lubricating oil in the oil storage box 3 is injected into the piston tube 26 through the oil pipe 31 through the pump body, and wet lubrication is performed to avoid damage caused by excessive wear.

[0026] An oil delivery pipe 31 is connected to the side wall of the oil storage box 3 through the pump body. One end of the oil delivery pipe 31 away from the oil storage box 3 passes through the box body 2 and is inserted into the piston tube 26 and is installed with a one-way valve.

[0027] By adopting the above technical solution, the one-way valve can prevent the lubricating oil in the piston tube 26 from being squeezed into the oil delivery pipe 31.

[0028] The top of the rotating shaft 25 is rotatably inserted in the mounting frame 13 and is fixed with a first gear 42. A vertically arranged first transmission shaft 41 is rotatably arranged near the rotating shaft 25 in the mounting frame 13. A second gear 43 meshing with the first gear 42 is fixedly arranged on the first transmission shaft 41. A horizontally arranged cross bar 4 is inserted near the first transmission shaft 41 at the top of the mounting frame 13. One end of the cross bar 4 is connected to the first transmission shaft 41 through two meshing bevel gears. A second transmission shaft 45 is fixedly arranged on the end of the connecting shaft 17 close to the cross bar 4 away from the wire-pressing roller 14. The second transmission shaft 45 and the first transmission shaft 41 are connected through a belt 44.

[0029] By adopting the above technical solution, the rotation of the crimping roller 14 and the rotation shaft 25 can be synchronously connected, thereby improving the overall operational linkage of the device.

[0030] The first gear 42 and the second gear 43 are a large gear and a small gear respectively.

[0031] By adopting the above technical solution, the small gear drives the large gear to rotate, so that the rotation speed of the shaft 25 can be controlled to avoid the rapid discharge of lubricating oil due to excessive rotation speed, which affects the subsequent overall use time.

[0032] The connecting component includes a slot 56, which is opened at the end of the mounting shaft 15. A mounting slot 5 is opened at the end of the connecting tube away from the mounting frame 13. A protrusion 51 is fixedly provided at the end of the connecting shaft 17 away from the mounting frame 13. A movable rod 52 is movably inserted at the end of the protrusion 51. A pull block 53 is fixedly provided at the end of the movable rod 52 away from the protrusion 51. A clamping block 55 is fixedly provided at the end of the movable rod 52 located inside the protrusion 51. The clamping block 55 can be inserted in the slot 56. A return spring 54 is sleeved on the movable rod 52 between the clamping block 55 and the protrusion 51.

[0033] The length of the installation groove 5 is longer than the distance from the clamping groove 56 to the end of the installation shaft 15 .

[0034] By adopting the above technical solution, such an arrangement can ensure that during installation, the installation shafts 15 at both ends are prevented from being unable to be inserted into the installation grooves 5, resulting in unsuccessful installation.

[0035] A top plate 61 is fixedly provided on two opposite sides of the top of the fixed box 12, and a long plate 6 is fixedly provided on the upper surface of the installation box 1 just below the top plate 61. A screw rod 62 is rotatably provided in the long plate 6, and the threads at both ends of the screw rod 62 are opposite. Slide blocks 63 are slidably provided at both ends of the long plate 6. The slide blocks 63 are threadedly inserted in the ends of the screw rod 62, and a top rod 64 is hingedly provided between the slide block 63 and the top plate 61. A drive motor 65 is fixedly installed at one end of the long plate 6, and the output end of the drive motor 65 is coaxially fixed on the screw rod 62.

[0036] By adopting the above technical solution, the fixing box 12 can be controlled to move up and down, so as to complete the functions of pressing the wire and subsequently disassembling the pressing roller 14 .

[0037] Two symmetrically arranged limiting rollers 7 are installed inside the installation box 1 , and both ends of the limiting rollers 7 are rotatably arranged on the inner wall of the installation box. The pressing roller 14 is arranged between two adjacent limiting rollers 7 .

[0038] By adopting the above technical solution, the limiting roller 7 is provided to limit the spinning, thereby avoiding deviation and causing problems in subsequent production.

[0039] Working principle: When in use, the staff processes the yarn to be pressed through the tubes at both ends of the installation box 1, and sets it between the limit rollers 7. The driving motor 65 drives the slider 63 to move by controlling the rotation of the screw rod 62. Since the threads at both ends of the screw rod 62 are opposite, the sliders 63 at both ends of the screw rod 62 can be directly driven to move toward or away from each other at the same time. At this time, the top rod 64 set between the slider 63 and the top plate 61 on the fixed box 12 will move vertically or horizontally, thereby adjusting the overall horizontal up and down movement of the fixed box 12. When the fixed box 12 moves down, the wire pressing roller 14 inside it will press the yarn between the limit rollers 7. Operation, when the fixing box 12 moves up, the crimping roller 14 is separated from the installation box 1, and then the staff can directly pull the pull block 53 to drive the clamping block 55 to separate from the clamping groove 56 on the installation shaft 15. At this time, the installation shaft 15 will cancel the fixed connection with the connecting shaft 17. The staff can first disassemble from one end and then disassemble the other end to complete the disassembly of the installation shaft 15 and the crimping roller 14. During the subsequent installation, one end can be inserted into the deepest part of the installation groove 5 in the connecting shaft 17. At this time, the installation shaft 15 at the other end of the crimping roller 14 will be inserted into the installation groove 5, and the reset spring 54 will push the clamping block 55 to be stably inserted into the clamping groove 56, thereby completing the fixation; Later, when the spinning line is pulled, the pressing roller 14 is driven to rotate. When the pressing roller 14 is rotated, the second transmission shaft 45 is driven to rotate through the mounting shaft 15 and the connecting shaft 17. At this time, the second transmission shaft 45 drives the cross bar 4 to rotate through the belt 44. At this time, the cross bar 4 drives the first transmission shaft 41 to rotate through the bevel gear. At this time, the first transmission shaft 41 will drive the first gear 42 to rotate through the second gear 43. At this time, the rotating first gear 42 will drive the rotating shaft 25 to rotate. At this time, the continuously rotating rotating shaft 25 will drive the bottom push block 24 to rotate. At this time, one end of the push block 24 will be against the rectangular groove 22. At this time, the movable plate 21 is pushed by the push block 24 and will move toward the side of the rectangular groove 22 that contacts the push block 24. As the push block 24 rotates to the arc groove 23 at one end in contact with the rectangular groove 22, the other end of the push block 24 will move. The end will contact with the other side of the rectangular groove 22, thereby pushing the movable plate 21 to move toward the other side. When the crimping roller 14 rotates through the above operation, the movable plate 21 will move back and forth repeatedly, so that the piston rod 27 and the piston head 28 at the end of the movable plate 21 perform piston movement in the piston tube 26. The lubricating oil in the oil storage box 3 is injected into the piston tube 26 through the oil pipe 31 through the pump body. At the same time, when the piston head 28 moves as a piston, the lubricating oil in the piston tube 26 is squeezed into the delivery hose 32, and is injected into the rotating bearing 16 through the oil injection nozzle 33 to lubricate it. When the crimping roller 14 rotates, the bearing 16 at the end can be directly lubricated. Timely lubrication can ensure that the bearing 16 drives the crimping roller 14 to rotate normally, and avoids the problem of uneven rotation of the crimping roller 14 and other components due to damage to the bearing 16 during rotation, resulting in vibration and noise.

[0040] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A thread pressing mechanism for a color-spinning spinning machine, comprising a mounting box (1), characterized in that: A fixing box (12) is movably inserted at the top of the installation box (1), and two symmetrically arranged mounting frames (13) are fixedly arranged inside the fixing box (12). The mounting frames (13) are arranged in an inverted U shape as a whole. A wire pressing roller (14) is rotatably mounted at the middle of the bottom of both ends of the installation frame (13), and mounting shafts (15) are fixedly arranged at both ends of the wire pressing roller (14). Bearings (16) corresponding to the mounting shafts (15) are rotatably mounted at the bottom of both ends of the installation frame (13). A connecting shaft (17) is fixedly arranged at the inner ring of the rotating shaft (25), and a connecting assembly is arranged between the connecting shaft (17) and the mounting shaft (15). A delivery hose (32) is fixedly mounted on one side of the two ends of the installation frame (13) through a fixing block, and an oiling nozzle (33) is installed at the bottom of the delivery hose (32). An oil storage box (3) is fixedly mounted on the lower surface of the top of the installation frame (13).

2. A thread pressing mechanism for a color spinning machine as claimed in claim 1, characterized in that: A box body (2) is fixedly provided at the top of the upper surface of the oil storage box (3), and the top of the box body (2) is fixedly provided on the lower surface of the mounting frame (13). A horizontally arranged movable plate (21) is provided at the middle end of the inner part of the box body (2), and a rectangular groove (22) is provided through the middle end of the movable plate (21). An arc groove (23) is provided at the diagonal of the rectangular groove (22). A vertically arranged rotating rod is fixedly provided at the middle end of the rectangular groove (22), and a Y-shaped push block (24) is fixedly provided at the top of the rotating rod. The end of the push block (24) can abut against the rectangular groove (22), piston rods (27) are fixedly provided at both ends of the movable plate (21), a piston head (28) is fixedly provided at one end of the piston rod (27) away from the movable plate (21), a piston tube (26) is fixedly provided at both ends of the box body (2), the ends of the piston rod (27) and the piston head (28) away from the box body (2) are inserted into the piston tube (26), and the end of the delivery hose (32) away from the oiling nozzle (33) is inserted into the piston tube (26).

3. A thread pressing mechanism for a color spinning machine as claimed in claim 2, characterized in that: An oil delivery pipe (31) is provided at the side wall of the oil storage box (3) through the pump body. One end of the oil delivery pipe (31) away from the oil storage box (3) passes through the box body (2), is inserted into the piston tube (26), and is provided with a one-way valve.

4. A thread pressing mechanism for a color spinning machine as claimed in claim 2, characterized in that: The top of the rotating shaft (25) is rotatably inserted in the mounting frame (13) and fixedly provided with a first gear (42); a vertically arranged first transmission shaft (41) is rotatably arranged in the mounting frame (13) near the rotating shaft (25); a second gear (43) meshing with the first gear (42) is fixedly provided on the first transmission shaft (41); a horizontally arranged cross bar (4) is inserted in the top of the mounting frame (13) near the first transmission shaft (41); one end of the cross bar (4) is connected to the first transmission shaft (41) via two meshing bevel gears; a second transmission shaft (45) is fixedly provided at one end of the connecting shaft (17) near the cross bar (4) away from the wire pressing roller (14); the second transmission shaft (45) and the first transmission shaft (41) are connected via a belt (44) for transmission.

5. A thread pressing mechanism for a color spinning machine as claimed in claim 4, characterized in that: The first gear (42) and the second gear (43) are respectively a large gear and a small gear.

6. A thread pressing mechanism for a color spinning machine as claimed in claim 1, characterized in that: The connecting assembly comprises a slot (56), wherein the slot (56) is formed at an end of the mounting shaft (15); a mounting slot (5) is formed at one end of the connecting tube away from the mounting frame (13); a protrusion (51) is fixedly provided at one end of the connecting shaft (17) away from the mounting frame (13); a movable rod (52) is movably inserted at the end of the protrusion (51); a pull block (53) is fixedly provided at one end of the movable rod (52) away from the protrusion (51); a locking block (55) is fixedly provided at one end of the movable rod (52) located inside the protrusion (51); the locking block (55) can be inserted into the slot (56); and a return spring (54) is sleeved on the movable rod (52) between the locking block (55) and the protrusion (51).

7. A thread pressing mechanism for a color spinning machine as claimed in claim 6, characterized in that: The length of the installation groove (5) is longer than the distance from the clamping groove (56) to the end of the installation shaft (15).

8. A thread pressing mechanism for a color spinning machine as claimed in claim 1, characterized in that: A top plate (61) is fixedly provided on two opposite sides of the top of the fixing box (12); a long plate (6) is fixedly provided on the upper surface of the installation box (1) directly below the top plate (61); a screw rod (62) is rotatably provided in the long plate (6); threads at both ends of the screw rod (62) are opposite; sliders (63) are slidably provided at both ends of the long plate (6); the sliders (63) are threadedly inserted into the ends of the screw rod (62); and a top rod (64) is hingedly provided between the slider (63) and the top plate (61).

9. A thread pressing mechanism for a color spinning machine as claimed in claim 8, characterized in that: A driving motor (65) is fixedly mounted on one end of the long plate (6), and an output end of the driving motor (65) is coaxially fixedly arranged on the screw rod (62).

10. A thread pressing mechanism for a color spinning machine as claimed in claim 1, characterized in that: Two symmetrically arranged limiting rollers (7) are installed inside the installation box (1), and the two ends of the limiting rollers (7) are rotatably arranged on the inner wall of the installation box, and the pressing roller (14) is arranged between two adjacent limiting rollers (7).

Images