A rolling device for automatically changing rolls of nonwoven fabrics

Abstract

The present invention discloses a non-woven fabric automatic roll-changing device, comprising a frame and a reel, a cloth guide roller and a drive shaft are installed on the frame, first friction wheels are installed at both ends of the drive shaft, a second friction wheel matched with the first friction wheel is installed on the reel, a reel upper material position and a reel lower material position are arranged in the frame, a fixed bracket for carrying the rolled reel is fixed on the frame, and the device also comprises an empty reel transfer mechanism, a rolled reel transfer mechanism and a roll-changing and cutting mechanism. The roll-forming device of the present invention clamps the empty reel through the empty reel transfer mechanism, the roll-changing and cutting mechanism automatically cuts the non-woven fabric, and winds the non-woven fabric on the empty reel at the reel upper material position, the rolled reel transfer mechanism moves to transport the rolled reel to the fixed bracket, and the non-woven fabric can be automatically rolled, cut and rolled, with a high degree of automation, which can significantly improve the rolling efficiency of the non-woven fabric, reduce the burden of manual labor, and improve safety.

Description

Technical Field

[0001] The invention relates to the field of non-woven fabric production equipment, in particular to a non-woven fabric automatic roll-changing rolling device. Background Art

[0002] Non-woven fabric, or non-woven fabric, is a fabric that does not require spinning and weaving. It is made by orienting or randomly arranging textile short fibers or filaments to form a fiber mesh structure, and then reinforced by mechanical, thermal bonding or chemical methods. It has the characteristics of moisture-proof, breathable, flexible, lightweight, non-combustible, easy to decompose, non-toxic and non-irritating, rich in colors, low price, and recyclable. Non-woven fabric is rolled up by a rolling device, and is cut off when it reaches a certain thickness, and a new roll is replaced. The existing non-woven fabric rolling device's roll replacement process and roll unloading process need to be performed manually, with low automation, low safety, and low operating efficiency. Summary of the invention

[0003] The purpose of the present invention is to solve the above problems and to design a nonwoven fabric automatic roll-changing device.

[0004] The technical solution of the present invention to achieve the above-mentioned purpose is a non-woven fabric automatic roll-changing device, including a frame and a reel, a cloth guide roller and a drive shaft are installed on the frame, a first friction wheel is installed at both ends of the drive shaft, a second friction wheel matched with the first friction wheel is installed on the reel, a reel upper material position and a reel lower material position are provided in the frame, a fixed bracket for carrying the rolled reel is fixed on the frame, and also includes:

[0005] The empty reel transfer mechanism clamps the empty reel at the reel upper material position and transports the empty reel to the reel lower material position;

[0006] The rolled reel transfer mechanism lifts the empty reel conveyed by the empty reel transfer mechanism at the reel unloading position, and conveys the empty reel to the fixed bracket after the reel is rolled;

[0007] The roll-changing and cutting mechanism cooperates with the unloaded roll at the roll loading position to cut the non-woven fabric after the roll is rolled.

[0008] Preferably, the number of the unloaded reel transfer mechanisms is two, the two unloaded reel transfer mechanisms operate synchronously and are respectively arranged at both ends of the reel; the unloaded reel transfer mechanism includes a rotating sleeve coaxially arranged with the driving shaft, the rotating sleeve is installed on the driving shaft through a bearing, the rotating sleeve is located at the outside of the first friction wheel disk, a rotating bracket is fixed to the rotating sleeve, a first electric cylinder and two fixed supporting wheels are installed on the rotating bracket, a first rotating shaft is installed on the rotating bracket, a first gear and a movable supporting wheel frame are installed on the first rotating shaft, a movable supporting wheel is installed on the movable supporting wheel frame, the movable supporting wheel cooperates with the two fixed supporting wheels to clamp or unload the reel, a connecting frame is installed at the telescopic end of the first electric cylinder, a spur rack meshingly connected to the first gear is installed on the connecting frame, an electric slip ring is coaxially installed on the driving shaft, a fixed end of the electric slip ring is installed on the frame, the first electric cylinder is electrically connected to the electric slip ring, a gear ring is coaxially installed on the rotating sleeve, a second rotating shaft is installed on the frame, a second gear is installed on the second rotating shaft, and the second gear is meshingly connected to the gear ring.

[0009] Preferably, the unloaded reel transfer mechanism also includes a first servo motor, a first active synchronous wheel is installed on the output end of the first servo motor, a first driven synchronous wheel is installed on the second rotating shaft, and the first active synchronous wheel and the first driven synchronous wheel are connected through a first synchronous belt transmission.

[0010] Preferably, it also includes a reduction motor, a driving pulley is installed at the output end of the reduction motor, a driven pulley is installed on the driving shaft, and the driving pulley and the driven pulley are connected by a transmission belt.

[0011] Preferably, the rolled reel transfer mechanism comprises two electric slides fixed to the bottom of the frame and moving synchronously, a second electric cylinder is mounted on the electric slide, and a movable bracket is mounted on the telescopic end of the second electric cylinder.

[0012] Preferably, a first detection frame is installed on the slide seat of one of the electric slides, and a first proximity switch is installed on the first detection frame. The first proximity switch is located between the lower material position of the reel and the fixed bracket, and the first proximity switch detects the rolled thickness of the reel.

[0013] Preferably, the roll-changing and cutting mechanism includes a third rotating shaft installed on the frame, an L-shaped frame is installed on the third rotating shaft, a hollow roller is installed on the other end of the L-shaped frame, the hollow roller has a cavity inside, and the hollow roller has a first opening and a second opening that penetrates the cavity along its axial direction, the first opening and the second opening are arranged opposite to each other, a sliding card is provided at the first opening with a protrusion for cooperating with the reel, one end of the protrusion can extend out of the first opening, a spring fixing plate is fixed in the cavity, a compression spring for pushing one end of the protrusion out of the first opening is installed between the spring fixing plate and the protrusion, two fixing rods are fixed in the cavity, a connecting rod is rotatably installed on the fixing rod, a cutter is hinged between the two connecting rods, and a push rod is hinged between the connecting rod and the protrusion.

[0014] Preferably, the roll changing and cutting mechanism also includes a second servo motor, a second driving synchronous wheel is installed on the output end of the second servo motor, a second driven synchronous wheel is installed on the third rotating shaft, and the second driving synchronous wheel and the second driven synchronous wheel are connected through a second synchronous belt transmission.

[0015] Preferably, a second detection frame is installed on the L-shaped frame, and a second proximity switch is installed on the second detection frame, and the second proximity switch detects whether the non-woven fabric is cut.

[0016] The beneficial effects of the present invention are as follows: the unloaded reel is clamped by the unloaded reel transfer mechanism, and the driving shaft drives the second friction wheel disc and the reel to rotate through the first friction wheel disc, so that the reel reels the non-woven fabric. When the thickness of the non-woven fabric rolled on the reel reaches the preset thickness to be cut, the reel changing and cutting mechanism automatically operates to cut the non-woven fabric, and winds the non-woven fabric on the unloaded reel on the reel. The rolled reel transfer mechanism moves to transport the rolled reel to the fixed bracket, and the unloaded reel transfer mechanism transports the unloaded reel to the reel lower material position. During the movement, the first friction wheel disc and the second friction wheel disc are always in friction contact, and the reel continuously rotates to roll up the non-woven fabric. After the rolled reel transfer mechanism returns to its original position, it lifts the unloaded reel at the reel lower material position. The rolling device of the present invention can automatically roll, cut and change the non-woven fabric, has a high degree of automation, can significantly improve the rolling efficiency of the non-woven fabric, reduce the burden of manual labor, and improve safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] Figure 2 is a top view of the present invention;

[0019] Figure 3 is another state diagram of the present invention;

[0020] Figure 4 is a cross-sectional view of a hollow roller;

[0021] Figure 5 This is a partial schematic diagram of the present invention during roll change and cutting. Figure 1 ;

[0022] Figure 6 This is a partial schematic diagram of the present invention during roll change and cutting. Figure 2 ;

[0023] Figure 7 is a cross-sectional view of a hollow roller of the present invention;

[0024] Figure 8 yes Figure 1 A partial enlarged view of the middle A;

[0025] In the figure, 1, frame; 2, reel; 3, cloth guide roller; 4, driving shaft; 5, first friction wheel; 6, second friction wheel; 7, reel upper material position; 8, reel lower material position; 9, fixed bracket; 10, non-woven fabric; 11, rotating sleeve; 12, bearing; 13, rotating bracket; 14, first electric cylinder; 15, fixed supporting wheel; 16, first rotating shaft; 17, first gear; 18, movable supporting wheel frame; 19, movable supporting wheel; 20, connecting frame; 21, spur rack; 22, electric slip ring; 23, gear ring; 24, second rotating shaft; 25, second gear; 26, first servo motor; 27, first active synchronous wheel; 28, first driven synchronous wheel; 29, first synchronous belt; 30. reduction motor; 31. driving pulley; 32. driven pulley; 33. transmission belt; 34. electric slide; 35. second electric cylinder; 36. movable bracket; 37. first detection frame; 38. first proximity switch; 39. third rotating shaft; 40. L-shaped frame; 41. hollow roller; 42. cavity; 43. first opening; 44. second opening; 45. protrusion; 46. spring fixing plate; 47. compression spring; 48. fixing rod; 49. connecting rod; 50. cutter; 51. push rod; 52. second servo motor; 53. second driving synchronous wheel; 54. second driven synchronous wheel; 55. second synchronous belt; 56. second detection frame; 57. second proximity switch. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below in conjunction with the accompanying drawings. Figure 1-8 As shown: A non-woven fabric automatic roll-changing device comprises a frame 1 and a reel 2, a cloth guide roller 3 and a drive shaft 4 are mounted on the frame 1, first friction discs 5 are mounted at both ends of the drive shaft 4, a second friction disc 6 cooperating with the first friction disc 5 is mounted on the reel 2, a reel loading position 7 and a reel unloading position 8 are arranged in the frame 1, a fixed bracket 9 for carrying the rolled reel 2 is fixed on the frame 1, and further comprises:

[0027] The empty reel transfer mechanism clamps the empty reel 2 at the reel upper material position 7 and transports the empty reel 2 to the reel lower material position 8;

[0028] The rolled reel transfer mechanism lifts the empty reel 2 conveyed by the empty reel transfer mechanism at the reel unloading position 8, and conveys the reel 2 to the fixed bracket 9 after the reel 2 is rolled;

[0029] The roll changing and cutting mechanism cooperates with the unloaded reel 2 at the reel loading position 7 to cut the nonwoven fabric 10 after the reel 2 is rolled.

[0030] In order to realize the transfer function of the empty reel 2, an empty reel transfer mechanism is provided, such as Figure 1-3As shown, there are two unloaded reel transfer mechanisms, which operate synchronously and are respectively arranged at both ends of the reel 2; the unloaded reel transfer mechanism includes a rotating sleeve 11 coaxially arranged with the drive shaft 4, the rotating sleeve 11 is installed on the drive shaft 4 through a bearing 12, the rotating sleeve 11 is located outside the first friction wheel 5, a rotating bracket 13 is fixed to the rotating sleeve 11, a first electric cylinder 14 and two fixed supporting wheels 15 are installed on the rotating bracket 13, a first rotating shaft 16 is installed on the rotating bracket 13, a first gear 17 and a movable supporting wheel frame 18 are installed on the first rotating shaft 16, and the movable supporting wheel 19 is installed on the first rotating shaft 16. A movable support wheel 19 is installed on the frame 18, and the movable support wheel 19 cooperates with two fixed support wheels 15 to clamp or remove the reel 2. A connecting frame 20 is installed at the telescopic end of the first electric cylinder 14, and a spur rack 21 meshing with the first gear 17 is installed on the connecting frame 20. An electric slip ring 22 is coaxially installed on the drive shaft 4, and the fixed end of the electric slip ring 22 is installed on the frame 1. The first electric cylinder 14 is electrically connected to the electric slip ring 22. A gear ring 23 is coaxially installed on the rotating sleeve 11. A second rotating shaft 24 is installed on the frame 1, and a second gear 25 is installed on the second rotating shaft 24. The second gear 25 is meshing with the gear ring 23. By setting the electric slip ring 22, the first electric cylinder 14 can be powered on to receive signals when rotating.

[0031] To drive the second rotating shaft 24 to rotate, Figure 2 As shown, a first servo motor 26 is also provided, a first active synchronous wheel 27 is installed at the output end of the first servo motor 26, a first driven synchronous wheel 28 is installed on the second rotating shaft 24, and the first active synchronous wheel 27 and the first driven synchronous wheel 28 are connected by a first synchronous belt 29. The two first servo motors 26 are electrically connected to a controller, and the controller is electrically connected to the first electric cylinder through an electric slip ring. The controller is electrically connected to the other electrical components of the device, and the controller controls the two first servo motors 26 to move synchronously so as to transfer the reel 2.

[0032] To drive the drive shaft 4 to rotate, Figure 2 As shown, a reduction motor 30 is also provided, a driving pulley 31 is installed at the output end of the reduction motor 30, a driven pulley 32 is installed on the driving shaft 4, and the driving pulley 31 and the driven pulley 32 are connected through a transmission belt 33.

[0033] In order to realize the unloading of the roll 2 and the support of the roll 2 when the nonwoven fabric 10 is wound, a roll transfer mechanism is provided, such as Figure 1-3 As shown, the roll transfer mechanism includes two electric slides 34 fixed to the bottom of the frame 1 and moving synchronously, a second electric cylinder 35 is installed on the electric slide 34, and a movable bracket 36 is installed at the telescopic end of the second electric cylinder 35. The spacing of the movable bracket 36 is smaller than the spacing of the two fixed brackets 9, so that the roll 2 can be transported to the fixed bracket 9.

[0034] In order to detect the thickness of the reel 2 and know the timing of cutting and rewinding the nonwoven fabric 10, as shown in FIG. Figure 1-3 As shown, a first detection frame 37 is installed on the slide seat of one of the electric slides 34, and a first proximity switch 38 is installed on the first detection frame 37. The first proximity switch 38 is located between the reel unloading position 8 and the fixed bracket 9, and the first proximity switch 38 detects the thickness of the reel 2. The first proximity switch 38 uses a capacitive proximity sensor, a photoelectric proximity switch, an ultrasonic proximity switch or a microwave proximity switch. When the thickness of the non-woven fabric 10 wound on the reel 2 reaches a certain value and enters the detection range of the first proximity switch 38, the first proximity switch 38 can automatically detect and send a signal to the controller, and then the non-woven fabric 10 can be cut and rewound.

[0035] In order to realize the automatic cutting of the nonwoven fabric 10, a roll changing and cutting mechanism is provided, such as Figure 1-3 As shown, the roll-changing and cutting mechanism includes a third rotating shaft 39 installed on the frame 1, an L-shaped frame 40 is installed on the third rotating shaft 39, a hollow roller 41 is installed at the other end of the L-shaped frame 40, a cavity 42 is provided in the hollow roller 41, a first opening 43 and a second opening 44 which are connected to the cavity 42 are opened on the hollow roller 41 along its axial direction, the first opening 43 and the second opening 44 are arranged opposite to each other, a protrusion 45 which is slidably mounted on the first opening 43 for cooperating with the reel 2, one end of the protrusion 45 can extend out of the first opening 43, a spring fixing plate 46 is fixed in the cavity 42, a compression spring 47 for pushing one end of the protrusion 45 out of the first opening 43 is installed between the spring fixing plate 46 and the protrusion 45, two fixing rods 48 are fixed in the cavity 42, a connecting rod 49 is rotatably installed on the fixing rod 48, a cutter 50 is hinged between the two connecting rods 49, and a push rod 51 is hinged between the connecting rod 49 and the protrusion 45. There are two spring fixing plates 46 and two compression springs 47. In the natural state, under the pressure of the compression spring 47, one end of the protrusion 45 extends out of the first opening 43 and is in the shape of a long arc-shaped protrusion. The other end of the protrusion 45 is larger than the first opening 43 and cannot extend out, so it is pressed against the inner wall of the cavity 42. The cutter 50 is located in the second opening 44 and does not extend out of the hollow roller 41 to avoid accidentally touching the non-woven fabric 10. When the hollow roller 41 is in friction contact with the reel 2, it will be forced to rotate. When the protrusion 45 contacts the reel 2, it will be pressed into the cavity 42, and then the cutter 50 will be pushed out to cut the non-woven fabric 10. After the protrusion 45 is separated from the reel 2, under the elastic force of the compression spring 47, the cutter 50 automatically retracts into the second opening 44 and does not contact the reel 2.

[0036] In order to facilitate driving the third rotating shaft 39 to rotate, Figure 2As shown, the roll changing and cutting mechanism also includes a second servo motor 52, a second active synchronous wheel 53 is installed at the output end of the second servo motor 52, a second driven synchronous wheel 54 is installed on the third rotating shaft 39, and the second active synchronous wheel 53 and the second driven synchronous wheel 54 are connected through a second synchronous belt 55.

[0037] In order to detect whether the nonwoven fabric 10 is cut, Figure 1 As shown, a second detection frame 56 is mounted on the L-shaped frame 40, and a second proximity switch 57 is mounted on the second detection frame 56. The second proximity switch 57 detects whether the nonwoven fabric 10 is cut. The second proximity switch 57 can be a photoelectric proximity switch, an ultrasonic proximity switch or a microwave proximity switch.

[0038] The working principle of this implementation scheme is: initially, if Figure 3 As shown, the unloaded reel transfer mechanism is located at the reel loading position 7, clamping the unloaded reel 2, the movable bracket 36 is located at the reel unloading position 8 to hold another reel 2, the reduction motor 30 drives the drive shaft 4 to rotate clockwise, the drive shaft 4 drives the second friction wheel 6 and the reel 2 to rotate counterclockwise through the first friction wheel 5, the reel 2 at the reel unloading position 8 reels the non-woven fabric 10, the thickness of the non-woven fabric 10 rolled on the reel 2 increases continuously, and gradually approaches the first proximity switch 38, when the first proximity switch 38 detects a signal, the non-woven fabric 10 rolled on the reel 2 reaches the preset thickness to be cut;

[0039] Then, the roll-changing and cutting mechanism works to cut the non-woven fabric 10, and winds the non-woven fabric 10 on the unloaded reel 2 at the reel upper material position 7. Specifically, the second servo motor 52 works to output a certain angular displacement, and drives the second driven synchronous wheel 54 and the third rotating shaft 39 to rotate through the second active synchronous wheel 53 and the second synchronous belt 55, such as Figure 5-6 As shown, the third rotating shaft 39 drives the L-shaped frame 40 to rotate upward, so that the hollow roller 41 abuts against the reel 2 at the reel upper material position 7, and the hollow roller 41 lifts the non-woven fabric 10 below the non-woven fabric 10 and presses it between the hollow roller 41 and the reel 2. The non-woven fabric 10 is further tensioned during the lifting process. The hollow roller 41 rotates under the action of friction. When the protrusion 45 contacts the reel 2, it will be pressed into the cavity 42. The protrusion 45 drives the connecting rod 49 to move through the push rod 51, and the connecting rod 49 drives the cutter 50 to extend out of the second opening in an arc shape. The cutter 50 extends out of the second opening 44 and contacts the tensioned nonwoven fabric 10. The length of the cutter 50 is greater than the width of the nonwoven fabric 10. Since the cutter 50 rises in an arc, it can fully contact and cut the nonwoven fabric 10. The second proximity switch 57 is close to the nonwoven fabric 10 at this time. After the nonwoven fabric 10 is cut, the second proximity switch 57 cannot detect any obstacles. Then the second servo motor 52 outputs a certain angular displacement in the reverse direction, and the roll-changing and cutting mechanism returns to its original position, making way for the subsequent movement of the unloaded reel transfer mechanism.

[0040] Then the rolled reel transfer mechanism moves to transport the rolled reel 2 to the fixed bracket 9. Specifically, the two second electric cylinders 35 extend synchronously to make the lowest point of the rolled reel 2 higher than the fixed bracket 9. Then the two electric slides 34 work synchronously to transport the rolled reel 2 to the top of the fixed bracket 9. Then the second electric cylinders 35 shrink synchronously to make the rolled reel 2 drop to the fixed bracket 9. The fixed bracket 9 lifts the rolled reel 2, and the worker can transfer the rolled reel 2 away through the lifting device.

[0041] Then, the two unloaded reel transfer mechanisms act synchronously to transport the unloaded reel 2 to the reel unloading position 8. Figure 1 As shown, specifically, two first servo motors 26 operate synchronously to output a certain angular displacement, and the first active synchronous wheel 27 and the first synchronous belt 29 drive the first driven synchronous wheel 28, the second rotating shaft 24, and the second gear 25 to rotate. The second gear 25 drives the gear ring 23, the rotating sleeve 11, and the rotating bracket 13 to rotate counterclockwise, and the reel 2 at the reel upper material position 7 is transported to the reel lower material position 8. During the movement, the first friction wheel 5 and the second friction wheel 6 are always in friction contact, and the reel 2 continues to rotate to reel the non-woven fabric 10;

[0042] Then the rolled reel transfer mechanism moves and returns to its original position, and the unloaded reel 2 is lifted by the movable support wheel 19. After the second proximity switch 57 detects that the reel 2 is in place, the telescopic ends of the two first electric cylinders 14 are synchronously retracted, and the spur rack 21 is driven to rise through the connecting frame 20, and the spur rack 21 drives the first gear 17 to rotate, thereby driving the movable support wheel 19 frame 18 to rotate downward, and the movable support wheel 19 no longer supports the reel 2, thereby making way for the unloaded reel transfer mechanism to be reset;

[0043] Subsequently, the two first servo motors 26 synchronously run again to output a certain angular displacement, and the unloaded reel transfer mechanism is reset. At this time, the movable supporting wheel 19 and the fixed supporting wheel 15 are located at the reel loading position 7, and the two fixed supporting wheels 15 are located below the movable supporting wheel 19. The next reel 2 can be placed on the two fixed supporting wheels 15, and then the telescopic ends of the two first electric cylinders 14 are controlled to extend synchronously, driving the movable supporting wheel 19 frame 18 to rotate downward, so that the movable supporting wheel 19 presses the reel 2, and the movable supporting wheel 19 and the fixed supporting wheel 15 jointly clamp the reel 2; this cycle is repeated to carry out the rolling operation of the non-woven fabric 10.

[0044] The above technical solutions only reflect the preferred technical solutions of the technical solutions of the present invention. Some changes that may be made to certain parts thereof by technicians in this technical field all reflect the principles of the present invention and fall within the protection scope of the present invention.

Claims

1. A nonwoven fabric automatic roll-changing device, comprising a frame (1) and a reel (2), wherein a cloth guide roller (3) and a drive shaft (4) are mounted on the frame (1), characterized in that: The driving shaft (4) is provided with first friction discs (5) at both ends, the reel (2) is provided with a second friction disc (6) that cooperates with the first friction disc (5), a reel loading position (7) and a reel unloading position (8) are provided in the frame (1), a fixed bracket (9) for carrying the rolled reel (2) is fixed on the frame (1), and further comprises: An empty reel transfer mechanism clamps the empty reel (2) at the reel upper material position (7) and transports the empty reel (2) to the reel lower material position (8); A rolled reel transfer mechanism, which lifts the empty reel (2) conveyed by the empty reel transfer mechanism at the reel lowering position (8), and conveys the reel (2) to a fixed bracket (9) after the reel (2) is rolled; A roll-changing and cutting mechanism cooperates with the unloaded reel (2) at the reel loading position (7) after the reel (2) is rolled to cut the non-woven fabric (10); The roll-changing and cutting mechanism comprises a third rotating shaft (39) mounted on the frame (1), an L-shaped frame (40) mounted on the third rotating shaft (39), a hollow roller (41) mounted on the other end of the L-shaped frame (40), the hollow roller (41) having a cavity (42) therein, a first opening (43) and a second opening (44) which are in communication with the cavity (42) being formed on the hollow roller (41) along its axial direction, the first opening (43) and the second opening (44) being arranged opposite to each other, and a protrusion which is slideably mounted on the first opening (43) and is used to cooperate with the reel (2) A member (45), one end of the protruding member (45) can extend out of the first opening (43), a spring fixing plate (46) is fixed in the cavity (42), a compression spring (47) is installed between the spring fixing plate (46) and the protruding member (45) for pushing one end of the protruding member (45) out of the first opening (43), two fixing rods (48) are fixed in the cavity (42), a connecting rod (49) is rotatably installed on the fixing rod (48), a cutting knife (50) is hinged between the two connecting rods (49), and a push rod (51) is hinged between the connecting rod (49) and the protruding member (45); The roll changing and cutting mechanism further comprises a second servo motor (52), a second active synchronous wheel (53) being mounted on the output end of the second servo motor (52), a second driven synchronous wheel (54) being mounted on the third rotating shaft (39), and the second active synchronous wheel (53) and the second driven synchronous wheel (54) being connected in transmission via a second synchronous belt (55); A second detection frame (56) is mounted on the L-shaped frame (40), and a second proximity switch (57) is mounted on the second detection frame (56), wherein the second proximity switch (57) detects whether the non-woven fabric (10) is cut; It also includes a reduction motor (30), wherein a driving pulley (31) is installed at the output end of the reduction motor (30), a driven pulley (32) is installed on the drive shaft (4), and the driving pulley (31) and the driven pulley (32) are connected to each other through a transmission belt (33).

2. The nonwoven fabric automatic roll-changing device according to claim 1, characterized in that: The number of the unloaded reel transfer mechanisms is two, the two unloaded reel transfer mechanisms operate synchronously and are respectively arranged at two ends of the reel (2); the unloaded reel transfer mechanism comprises a rotating sleeve (11) arranged coaxially with the drive shaft (4), the rotating sleeve (11) being mounted on the drive shaft (4) via a bearing (12), the rotating sleeve (11) being located outside the first friction wheel (5), a rotating bracket (13) being fixed on the rotating sleeve (11), a first electric cylinder (14) and two fixed rollers (15) being mounted on the rotating bracket (13), a first rotating shaft (16) being mounted on the first rotating shaft (16), a first gear (17) and a movable roller frame (18) being mounted on the movable roller frame (18), A movable supporting wheel (19) is provided, and the movable supporting wheel (19) cooperates with two fixed supporting wheels (15) to clamp or remove the reel (2); a connecting frame (20) is installed at the telescopic end of the first electric cylinder (14); a spur rack (21) meshingly connected to the first gear (17) is installed on the connecting frame (20); an electric slip ring (22) is coaxially installed on the drive shaft (4); the fixed end of the electric slip ring (22) is installed on the frame (1); the first electric cylinder (14) is electrically connected to the electric slip ring (22); a gear ring (23) is coaxially installed on the rotating sleeve (11); a second rotating shaft (24) is installed on the frame (1); a second gear (25) is installed on the second rotating shaft (24); and the second gear (25) is meshingly connected to the gear ring (23).

3. The nonwoven fabric automatic roll-changing device according to claim 2, characterized in that: The unloaded reel transfer mechanism further comprises a first servo motor (26), a first active synchronous wheel (27) being mounted on the output end of the first servo motor (26), a first driven synchronous wheel (28) being mounted on the second rotating shaft (24), and the first active synchronous wheel (27) and the first driven synchronous wheel (28) being connected in transmission via a first synchronous belt (29).

4. The nonwoven fabric automatic roll-changing device according to claim 1, characterized in that: The rolled reel transfer mechanism comprises two electric slides (34) fixed to the bottom of the frame (1) and moving synchronously, a second electric cylinder (35) being mounted on the electric slides (34), and a movable bracket (36) being mounted on the telescopic end of the second electric cylinder (35).

5. The nonwoven fabric automatic roll-changing device according to claim 4, characterized in that: A first detection frame (37) is installed on the slide seat of one of the electric slides (34), and a first proximity switch (38) is installed on the first detection frame (37). The first proximity switch (38) is located between the reel lowering position (8) and the fixed bracket (9), and the first proximity switch (38) detects the rolled thickness of the reel (2).

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