Uncoiler and coiled material feeding line using same

Abstract

The utility model discloses an uncoiling machine which comprises a machine body and a tensioning shaft on the machine body, a feeding device is arranged on the side, facing the tensioning shaft, of the machine body, and the feeding device comprises a first moving device, a first driving device, a second moving device, a second driving device, a third moving device, a third driving device and a fixing base used for containing coiled materials. The first driving device drives the first moving device to move in the horizontal direction and drives the second moving device, the third moving device and the fixing base to move so that the coiled material can be located in front of the tensioning shaft, and the third driving device drives the third moving device to move in the vertical direction and drives the fixing base to move upwards so that the coiled material and the tensioning shaft can be aligned in height. And the second driving device drives the second moving device to drive the third moving device and the fixed seat to move towards the tensioning shaft, so that the coiled material is sleeved on the tensioning shaft. According to the utility model, the coiled material is placed on the fixed seat by the forklift, and the coiled material is mounted on the tensioning shaft by the feeding device, so that the requirement on the use skill of the forklift is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of coil production equipment, in particular to an uncoiler and a coil feeding line using the same. Background Art

[0002] For the uncoilers on the market, workers need to use a forklift to lift the coil and align it with the tensioning rotating shaft of the uncoiler. Since the tensioning rotating shaft is at a relatively high horizontal position from the ground of the uncoiler, the worker observes with the naked eye to lift the coil so that the hollow part is aligned with the tensioning rotating shaft. To ensure the safety of the operation and the equipment, usually one person operates the forklift and the other observes and gives instructions. Moreover, due to the large weight of the coil, the installation of the coil on the tensioning rotating shaft requires a high proficiency in using the forklift by the workers. Summary of the Utility Model

[0003] The first object of the utility model is to provide an uncoiler that reduces the requirements for workers.

[0004] The first object of the utility model is achieved as follows.

[0005] An uncoiler includes a machine body and a tensioning shaft provided on one side of the machine body. An upper feeding device is provided on the side of the machine body facing the tensioning shaft. The upper feeding device includes a first moving device, a first driving device, a second moving device, a second driving device, a third moving device, a third driving device and a fixed seat for placing the coil. The first driving device drives the first moving device to move in the horizontal direction and drives the second moving device, the third moving device and the fixed seat to move so that the coil is located in front of the tensioning shaft. The third driving device drives the third moving device to move in the vertical direction and drives the fixed seat to move upward so that the coil and the tensioning shaft are aligned in height. The second driving device drives the second moving device to drive the third moving device and the fixed seat to move towards the tensioning shaft so that the coil is sleeved on the tensioning shaft.

[0006] In the utility model, the forklift places the coil on the fixed seat, and the upper feeding device realizes the installation of the coil on the tensioning shaft, reduces the requirements for the forklift operation skills, avoids the accidental danger caused by the collision between the forklift and the coil and the uncoiler due to improper operation, and the main body of the machine body is not easily damaged.

[0007] Further, the first moving device includes two mutually parallel first guide rails, a first fixing frame, and at least two sets of sliding wheel mechanisms. The two sets of sliding wheel mechanisms are arranged along the length direction of the first guide rails on the bottom surface of the first fixing frame. The sliding wheel mechanism includes a first rotating shaft, a first limiting roller, and a first bracket. Both ends of the first rotating shaft are rotatably connected to the first bracket, the first bracket is fixedly connected to the first fixing frame, and the first limiting rollers are respectively drivingly connected to both ends of the first rotating shaft near the first bracket. Each of the two first limiting rollers is seated on a first guide rail in a limiting manner. A first driven gear is fixed to the first rotating shaft of one of the sets of sliding wheel mechanisms. The first driving device is fixed on the first fixing frame. The first driving device is a first motor, and a first driving gear is provided on the output shaft of the first motor. The first driving gear is drivingly connected to the first driven gear. The second moving device, the second driving device, the third moving device, the third driving device, and the fixed seat are all arranged on the first fixing frame.

[0008] The first moving device realizes moving the coil from a position far from the main body of the uncoiler to the front of the tensioning shaft of the uncoiler. The first guide rails and the sliding wheel mechanisms have high load-bearing and transporting performance, meeting the usage requirements.

[0009] Further, the length direction of the first guide rails is perpendicular to the axial direction of the tensioning shaft. The first guide rails are arranged on one side of the machine body facing the tensioning shaft, and the perpendicular projection of the tensioning shaft falls between the two first guide rails.

[0010] It is convenient for the second moving device to put the coil on the tensioning shaft.

[0011] Further, the second moving device includes two mutually parallel second guide rails, a second fixing frame, and at least two sets of pulley mechanisms. The two sets of pulley mechanisms are arranged along the length direction of the second guide rails on the bottom surface of the second fixing frame. The pulley mechanism includes a second rotating shaft, a second limiting roller, and a second bracket. Both ends of the second rotating shaft are rotatably connected to the second bracket, the second bracket is fixedly connected to the second fixing frame, and the second limiting rollers are respectively drivingly connected to both ends of the second rotating shaft near the second bracket. Each of the two second limiting rollers is seated on a second guide rail in a limiting manner. A second driven gear is fixed to the second rotating shaft of one of the sets of sliding wheel mechanisms. The second driving device is fixed on the second fixing frame. The second driving device is a second motor, and a second driving gear is provided on the output shaft of the second motor. The second driving gear is drivingly connected to the second driven gear. The third moving device, the third driving device, and the fixed seat are all arranged on the second fixing frame.

[0012] The second moving device realizes putting the coil on the tensioning shaft. The second guide rails and the pulley mechanisms have high load-bearing and transporting performance, meeting the usage requirements.

[0013] Further, the length direction of the second guide rails is parallel to the axial direction of the tensioning shaft.

[0014] It is beneficial for the second moving device to put the coil through the tensioning shaft.

[0015] Further, the third moving device includes a plurality of hydraulic telescopic rods, and the third driving device includes a hydraulic cylinder. The hydraulic cylinder and the hydraulic telescopic rods are both vertically arranged on the second fixing frame of the second moving device. The hydraulic cylinders are evenly arranged around the hydraulic telescopic rods. The telescopic ends of the hydraulic cylinder and the hydraulic telescopic rods both extend upward out of the top surface of the second fixing frame and are connected and fixed to the bottom surface of the fixing seat. The synchronous expansion and contraction of the hydraulic cylinder and the hydraulic telescopic rods drive the fixing seat to move up and down.

[0016] The third moving device realizes lifting the coil to the same height as the tensioning shaft, which facilitates the second moving device to sleeved the coil on the tensioning shaft. The hydraulic cylinder and the hydraulic telescopic rods have high load-bearing and carrying performance, meeting the usage requirements.

[0017] Further, the third driving device further includes a hydraulic station, which is the hydraulic power source for the hydraulic cylinder and a plurality of hydraulic telescopic rods. The hydraulic station is arranged on the first fixing frame of the first moving device.

[0018] The hydraulic station does not need to be lifted with the coil, reducing energy consumption.

[0019] Further, a trapezoidal accommodating groove is provided on the top surface of the fixing seat along the axial direction of the tensioning shaft. Both ends of the trapezoidal accommodating groove are open. At least one limiting column is provided on each side of the fixing seat in the trapezoidal accommodating groove, and the top of the limiting column protrudes out of the top surface of the trapezoidal accommodating groove.

[0020] The trapezoidal accommodating groove facilitates the coil to move to the corresponding position automatically after being placed, facilitating the alignment of the axis of the coil and the axis of the tensioning shaft. The limiting columns prevent the coil from rolling laterally.

[0021] Further, buffer gaskets are respectively provided on both side walls of the trapezoidal accommodating groove. A plurality of jacks are respectively provided on both sides of the fixing seat in the trapezoidal accommodating groove along the length direction. The bottom of the limiting column is movably inserted into any one of the jacks.

[0022] The buffer gaskets prevent the fixing seat and the coil from being damaged by collision. The limiting columns can adjust their positions according to the axial length of the coil to better limit the lateral movement of the coil.

[0023] The second object of the present utility model is to provide a coil feeding line for improving production efficiency.

[0024] The second object of the present utility model is achieved as follows.

[0025] The coil feeding line includes a master control machine, a leveling machine, a welding machine, a feeding machine, a paper receiving machine, and the above-mentioned uncoiler. The master control machine is electrically connected to the leveling machine, the welding machine, the feeding machine, and the uncoiler respectively.

[0026] The feeding device of the uncoiler places the coil on the tensioning shaft of the uncoiler. The rotation of the tensioning shaft unfolds the coil, and the protective film on one side of the coil is guided to the winding shaft of the paper receiving machine.

[0027] The coiled material with the protective film torn off enters the flattening machine, and the coiled material is roll-pressed by the flattening machine until it becomes flat.

[0028] The flattened coiled material enters the conveyor belt of the feeder through the welding machine.

[0029] When the end part of the previous coiled material enters the welding machine, the feeder stops. Then, the front end part of the subsequent coiled material enters the welding machine.

[0030] After the two ends of the coiled materials are welded together by the welding machine to form a whole, the feeder continues to run.

[0031] The main control machine of the present utility model controls the flattening machine, the welding machine, the feeder, the paper collector and the uncoiler to run according to a preset program, improving the feeding efficiency of the coiled material, and thus helping to improve the production efficiency of the corresponding production line. Description of the Drawings

[0032] Figure 1 It is a schematic exploded view of the uncoiler for Embodiment 1.

[0033] Figure 2 It is a schematic three-dimensional structure view of the coiled material feeding line for Embodiment 1.

[0034] Figure 3 It is a schematic front structure view of the coiled material feeding line for Embodiment 1.

[0035] Figure 4 It is a schematic top structure view of the coiled material feeding line for Embodiment 1. Detailed Embodiment

[0036] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0037] Embodiment 1, as shown in Figure 1 shown, an uncoiler includes a machine body 1 and a tensioning shaft 11 provided on one side of the machine body 1. On the side of the machine body 1 facing the tensioning shaft 11, there is a loading device 10. The loading device 10 includes a first moving device 2, a first driving device 20, a second moving device 3, a second driving device 30, a third moving device 4, a third driving device 40 and a fixed seat 5 for placing the coiled material. The first driving device 20 drives the first moving device 2 to move in the horizontal direction and drives the second moving device 3, the third moving device 4 and the fixed seat 5 to move so that the coiled material is located in front of the tensioning shaft 11. The third driving device 40 drives the third moving device 4 to move in the vertical direction and drives the fixed seat 5 to move upward so that the coiled material and the tensioning shaft 11 are at the same height. The second driving device 30 drives the second moving device 3 to drive the third moving device 4 and the fixed seat 5 to move towards the tensioning shaft 11, so that the coiled material is sleeved on the tensioning shaft 11.

[0038] The first moving device 2 includes two mutually parallel first guide rails 21, a first fixing frame 22, and two sets of sliding wheel mechanisms 23. The two sets of sliding wheel mechanisms 23 are arranged along the length direction of the first guide rail 21 and are provided on the bottom surface of the first fixing frame 22. The sliding wheel mechanism 23 includes a first rotating shaft 24, a first limiting roller 25, and a first bracket 26. Both ends of the first rotating shaft 24 are rotatably connected to the first bracket 26. The first bracket 26 is fixedly connected to the first fixing frame 22. The first limiting rollers 25 are respectively drivingly connected to both ends of the first rotating shaft 24 near the first bracket 26. Each of the two first limiting rollers 25 is seated on a first guide rail 21 for limiting. A first driven gear 27 is fixed to the first rotating shaft 24 of one of the sets of sliding wheel mechanisms 23. The first driving device 20 is fixed on the first fixing frame 22. The first driving device 20 is a first motor. The output shaft of the first motor is provided with a first driving gear 28. The first driving gear 28 is drivingly connected to the first driven gear 27. Among them, the length direction of the first guide rail 21 is perpendicular to the axial direction of the tensioning shaft 11. The first guide rail 21 is provided on one side of the machine body 1 facing the tensioning shaft 11. The vertical projection of the tensioning shaft 11 falls between the two first guide rails 21. Preferably, the first limiting roller 25 is circumferentially provided with a first limiting groove adapted to the width of the first guide rail 21. The first limiting roller 25 is in rolling cooperation with the first guide rail 21 through the first limiting groove. First limiting blocks 29 are respectively provided at both ends of the first guide rail 21. The first limiting blocks 29 prevent the first limit from sliding out of the end of the first guide rail 21.

[0039] A first position detection sensor 12 and a second position detection sensor 13 are provided between the two first guide rails 21. The first fixing frame 22 stops when it moves to the first position detection sensor 12. At this position, the first fixing frame 22 is far from the tensioning shaft 11. Workers place the coil on the fixing seat 5 through a forklift. The first fixing frame 22 stops when it moves to the second position detection sensor 13. At this position, the first fixing frame 22 is close to the tensioning shaft 11, that is, the coil on the fixing seat 5 and the axis of the tensioning shaft 11 are on the same straight line in the vertical projection direction.

[0040] The second moving device 3, the second driving device 30, the third moving device 4, the third driving device 40, and the fixing seat 5 are all provided on the first fixing frame 22.

[0041] The second moving device 3 includes two second guide rails 31 parallel to each other, a second fixed frame 32 and two pulley mechanisms 33. The length direction of the second guide rail 31 is parallel to the axial direction of the tensioning shaft 11. The two pulley mechanisms 33 are arranged on the bottom surface of the second fixed frame 32 along the length direction of the second guide rail 31. The pulley mechanism 33 includes a second rotating shaft 34, a second limiting roller 35 and a second bracket 36. The two ends of the second rotating shaft 34 are respectively rotatably connected with the second bracket 36. The second bracket 36 is fixedly connected with the second fixed frame 32. The two ends of the second rotating shaft 34 are respectively connected to the second limiting roller 35 near the second bracket 36. The two second limiting rollers 35 are each limitedly seated on a second guide rail 31. The second rotating shaft 34 of one group of sliding wheel mechanisms 23 is fixed with a second driven gear 37. The second driving device 30 is fixed on the second fixed frame 32. The second driving device 30 is a second motor. The output shaft of the second motor is provided with a second driving gear 38. The second driving gear 38 is connected to the second driven gear 37. Preferably, the second limiting roller 35 is circumferentially provided with a second limiting groove adapted to the width of the second guide rail 31, and the second limiting roller 35 rolls with the second guide rail 31 through the second limiting groove. Second limiting blocks 39 are respectively provided at both ends of the second guide rail 31 to prevent the second limiting roller from sliding out of the end of the second guide rail 31.

[0042] The first proximity switch sensor 14 and the second proximity switch sensor 15 are provided on the side of the machine body 1 corresponding to the tensioning shaft 11, and the first proximity switch sensor 14 and the second proximity switch sensor 15 respectively detect the distance from the second fixing frame 32. When the first position detection sensor 12 detects the first fixing frame 22, the second fixing frame 32 starts to move on the second guide rail 31. When the second fixing frame 32 moves toward the tensioning shaft 11 and the second proximity switch sensor 15 detects the second fixing frame 32, the second fixing frame 32 stops moving, and the coil on the fixing seat 5 and the axis of the tensioning shaft 11 coincide in the vertical projection direction, that is, the hollow part of the coil can be sleeved on the tensioning shaft 11. When the second fixing frame 32 moves away from the tensioning shaft 11, the first proximity switch sensor 14 detects that the second fixing frame 32 moves to the preset farthest distance, and the coil on the fixing seat 5 and the axis of the tensioning shaft 11 are staggered in the vertical projection direction, and the coil is away from the tensioning shaft 11.

[0043] The third moving device 4 , the third driving device 40 and the fixing seat 5 are all arranged on the second fixing frame 32 .

[0044] The third moving device 4 includes four hydraulic telescopic rods 42, and the third driving device 40 includes a hydraulic cylinder 41 and a hydraulic station 43. The hydraulic station 43 is the hydraulic power source for the hydraulic cylinder 41 and the four hydraulic telescopic rods 42, and the hydraulic station 43 is arranged on the first fixing frame 22 of the first moving device 2. The hydraulic cylinder 41 and the hydraulic telescopic rods 42 are both vertically arranged on the second fixing frame 32 of the second moving device 3. The four hydraulic cylinders 41 are evenly arranged around the hydraulic telescopic rods 42. The telescopic ends of the hydraulic cylinder 41 and the hydraulic telescopic rods 42 both extend upward from the top surface of the second fixing frame 32 and are fixedly connected to the bottom surface of the fixing seat 5. The hydraulic cylinder 41 and the hydraulic telescopic rods 42 synchronously expand and contract to drive the fixing seat 5 to move up and down.

[0045] A trapezoidal placement groove 51 is arranged on the top surface of the fixing seat 5 along the axial direction of the tensioning shaft 11. Both ends of the trapezoidal placement groove 51 are open. The fixing seat 5 is respectively provided with two limiting columns 52 on both sides of the trapezoidal placement groove 51, and the tops of the limiting columns 52 protrude from the top surface of the trapezoidal placement groove 51. Among them, buffer gaskets 53 are respectively arranged on both side walls of the trapezoidal placement groove 51. The fixing seat 5 is respectively provided with a plurality of jacks 54 along the length direction on both sides of the trapezoidal placement groove 51, and the bottoms of the limiting columns 52 are movably inserted into any one of the jacks 54.

[0046] See Figures 2 - 4 As shown, the coil feeding line includes a master controller 6, a flattening machine 7, a welding machine 8, a feeder 9, a paper collecting machine 16 and the above-mentioned uncoiler. The master controller 6 is electrically connected to the flattening machine 7, the welding machine 8, the feeder 9 and the uncoiler respectively. Among them, the flattening machine 7, the welding machine 8, the feeder 9, the paper collecting machine 16 and the body 1 of the uncoiler are all prior arts and will not be described in detail in the present invention.

[0047] Its working process is as follows.

[0048] Workers place the coil in the trapezoidal placement groove 51 of the fixing seat 5 through a forklift, and the coil is automatically aligned under the guidance of the trapezoidal placement groove 51. The first fixing frame 22 moves the coil from the first position detection sensor 12 to the second position detection sensor 13 through the sliding wheel mechanism 23 and the first guide rail 21. The third moving device 4 lifts the fixing seat 5 to make the axes of the coil and the tensioning shaft 11 at the same height. The second fixing frame 32 moves the coil from the first proximity switch sensor 14 to the second proximity switch sensor 15 through the pulley mechanism 33 and the second guide rail 31, so that the hollow part of the coil is sleeved on the tensioning shaft 11. At this time, the tensioning shaft 11 tensions and fixes the coil, and the feeding device 10 runs in the reverse direction to reset and wait for the next coil.

[0049] The tension shaft 11 rotates to unwind the coil material. The protective film on one side of the coil material is manually torn off and guided to the winding shaft of the sheet stacker 16. The coil material with the protective film torn off is manually guided into the flattening machine 7, and the coil material is rolled by the flattening machine 7 until it is flat. The flattened coil material enters the conveyor belt of the feeder 9 through the welding machine 8. When the end part of the previous coil material enters the welding machine 8, the feeder 9 stops. The front end part of the next coil material enters the welding machine 8. After the two ends of the coil materials are welded end to end into one body by the welding machine 8, the feeder 9 continues to operate.

[0050] If terms such as first and second are used in the present utility model, they do not represent any order, quantity or importance, but are only used for distinction.

[0051] If terms such as a and an are used in the present utility model, they do not represent a limitation of quantity, but represent the existence of at least one of the mentioned objects.

[0052] If terms indicating orientation or position such as top, bottom, side, longitudinal, transverse, middle, center, outer, inner, horizontal, vertical, left, right, above, below, etc. are used in the present utility model, they mean to reflect relative positions rather than absolute positions.

[0053] If terms such as approximately, overall, nearly, similar, etc. are used in the present utility model, they are limiting terms used to indicate the existence of features but allowing certain deviations. The amount of allowable deviation may vary depending on the specific background.

Claims

1. An uncoiler, comprising a machine body (1) and a tension shaft (11) provided on one side of the machine body (1), characterized in that, On one side of the machine body (1) facing the tensioning shaft (11), there is a feeding device (10). The feeding device (10) includes a first moving device (2), a first driving device (20), a second moving device (3), a second driving device (30), a third moving device (4), a third driving device (40), and a fixed seat (5) for placing the coil. The first driving device (20) drives the first moving device (2) to move in the horizontal direction and drives the second moving device (3), the third moving device (4), and the fixed seat (5) to move so that the coil is located in front of the tensioning shaft (11). The third driving device (40) drives the third moving device (4) to move in the vertical direction and drives the fixed seat (5) to move upward so that the coil and the tensioning shaft (11) are aligned in height. The second driving device (30) drives the second moving device (3) to drive the third moving device (4) and the fixed seat (5) to move towards the tensioning shaft (11) so that the coil is sleeved on the tensioning shaft (11).

2. The decoiler according to claim 1, characterized in that, The first moving device (2) includes two mutually parallel first guide rails (21), a first fixing frame (22), and at least two sets of sliding wheel mechanisms (23). The two sets of sliding wheel mechanisms (23) are arranged along the length direction of the first guide rail (21) and are provided on the bottom surface of the first fixing frame (22). The sliding wheel mechanism (23) includes a first rotating shaft (24), a first limiting roller (25), and a first bracket (26). The two ends of the first rotating shaft (24) are respectively rotatably connected to the first bracket (26). The first bracket (26) is fixedly connected to the first fixing frame (22). At the two ends of the first rotating shaft (24) near the first bracket (26), the first limiting rollers (25) are respectively drivingly connected. The two first limiting rollers (25) are respectively seated on one first guide rail (21). The first rotating shaft (24) of one set of sliding wheel mechanisms (23) is fixed with a first driven gear (27). The first driving device (20) is fixed on the first fixing frame (22). The first driving device (20) is a first motor. The output shaft of the first motor is provided with a first driving gear (28). The first driving gear (28) is drivingly connected to the first driven gear (27). The second moving device (3), the second driving device (30), the third moving device (4), the third driving device (40), and the fixed seat (5) are all arranged on the first fixing frame (22).

3. The decoiler according to claim 2, characterized in that, The length direction of the first guide rail (21) is perpendicular to the axial direction of the tensioning shaft (11). The first guide rail (21) is arranged on one side of the machine body (1) facing the tensioning shaft (11). The vertical projection of the tensioning shaft (11) falls between the two first guide rails (21).

4. The decoiler according to claim 1, characterized in that, The second moving device (3) includes two parallel second guide rails (31), a second fixing frame (32), and at least two sets of pulley mechanisms (33). The two sets of pulley mechanisms (33) are arranged along the length direction of the second guide rail (31) and are provided on the bottom surface of the second fixing frame (32). The pulley mechanism (33) includes a second rotating shaft (34), a second limiting roller (35), and a second support (36). Both ends of the second rotating shaft (34) are rotatably connected to the second support (36), the second support (36) is fixedly connected to the second fixing frame (32), and the second limiting rollers (35) are respectively drivingly connected to both ends of the second rotating shaft (34) near the second support (36). Each of the two second limiting rollers (35) is seated on a second guide rail (31). A second driven gear (37) is fixed to the second rotating shaft (34) of one set of sliding wheel mechanisms (23). The second driving device (30) is fixed on the second fixing frame (32). The second driving device (30) is a second motor, and a second driving gear (38) is provided on the output shaft of the second motor. The second driving gear (38) is drivingly connected to the second driven gear (37). The third moving device (4), the third driving device (40), and the fixing seat (5) are all provided on the second fixing frame (32).

5. The decoiler according to claim 4, characterized in that, The length direction of the second guide rail (31) is parallel to the axial direction of the tensioning shaft (11).

6. The decoiler according to claim 1, characterized in that, The third moving device (4) includes a plurality of hydraulic telescopic rods (42), and the third driving device (40) includes a hydraulic cylinder (41). The hydraulic cylinder (41) and the hydraulic telescopic rods (42) are both vertically arranged on the second fixing frame (32) of the second moving device (3). The hydraulic cylinder (41) is evenly arranged around the hydraulic telescopic rods (42). The telescopic ends of the hydraulic cylinder (41) and the hydraulic telescopic rods (42) both extend upward from the top surface of the second fixing frame (32) and are fixedly connected to the bottom surface of the fixing seat (5). The synchronous telescoping of the hydraulic cylinder (41) and the hydraulic telescopic rods (42) drives the fixing seat (5) to move up and down.

7. The decoiler according to claim 6, characterized in that, The third driving device (40) further includes a hydraulic station (43). The hydraulic station (43) is the hydraulic power source for the hydraulic cylinder (41) and a plurality of hydraulic telescopic rods (42). The hydraulic station (43) is arranged on the first fixing frame (22) of the first moving device (2).

8. The decoiler according to claim 1, characterized in that, A trapezoidal accommodation groove (51) is provided on the top surface of the fixing seat (5) along the axial direction of the tensioning shaft (11). Both ends of the trapezoidal accommodation groove (51) are open. At least one limiting column (52) is provided on each side of the fixing seat (5) in the trapezoidal accommodation groove (51). The top of the limiting column (52) protrudes from the top surface of the trapezoidal accommodation groove (51).

9. The decoiler according to claim 8, characterized in that it is trapezoidal Buffer gaskets (53) are respectively provided on both side walls of the accommodation groove (51). A plurality of jacks (54) are respectively provided on both sides of the fixing seat (5) along the length direction in the trapezoidal accommodation groove (51). The bottom of the limiting column (52) is movably inserted into any one of the jacks (54).

10. Coil feeding line, including a master control machine (6), a flattening machine (7), a welding machine (8), a feeding machine (9), a paper receiving machine (16) and an uncoiler according to any one of claims 1-9, characterized in that, The total control machine (6) is electrically connected to the leveling machine (7), the welding machine (8), the feeding machine (9), and the uncoiler respectively. The loading device (10) of the decoiler places the coil on the tension shaft (11) of the decoiler. The tension shaft (11) rotates to unwind the coil, and the protective film on one side of the coil is guided to the winding shaft of the paper collector (16). The coil with the protective film torn off enters the flattening machine (7), and the coil is roll-pressed by the flattening machine (7) until it is flat. The flattened coil enters the conveyor belt of the feeder (9) through the welding machine (8). When the end part of the previous coil enters the welding machine (8), the feeder (9) stops, and the front end part of the next coil enters the welding machine (8). After the two ends of the coils are welded together by the welding machine (8) to form a single body, the feeder (9) continues to operate.

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