Edge cutting and material receiving device of splitting machine

Abstract

The invention provides an edge cutting and material collecting device of a splitting machine. The edge cutting and material collecting device comprises a rack. The conveying mechanism is a conveying channel used for conveying materials; the slitting mechanism is used for slitting the wide-width material into a plurality of narrow-width materials; the guide mechanism is used for guiding the plurality of slit narrow materials, so that the narrow materials are conveyed at intervals in a staggered manner; and the winding mechanism is provided with a plurality of material receiving parts in one-to-one correspondence with the narrow widths, and the material receiving parts are arranged in a staggered mode. According to the edge cutting and material collecting device of the splitting machine, the rack is arranged, the conveying mechanism is arranged on the rack, and materials can be conveyed through the conveying channel arranged on the conveying mechanism; the slitting mechanism is arranged above the conveying channel, so that the wide-width material can be slit into a plurality of narrow-width materials; the guide mechanism is arranged at the outlet of the conveying channel, so that a plurality of slit narrow materials can be guided, and the narrow materials are conveyed at intervals in a staggered manner; and the winding mechanism is arranged, so that the multiple narrow materials guided by the guide mechanism can be wound in a staggered mode.

Description

Technical Field

[0001] The invention belongs to the technical field of material slitting, and in particular relates to a trimming and collecting device for a slitting machine. Background Art

[0002] A slitting machine is a mechanical device that cuts wide-width paper, mica tape or film into multiple narrow-width materials. The slitting machine mainly fixes a large roll of raw materials (such as paper, film, non-woven fabric, etc.) on the unwinding shaft of the machine, and then drives the motor to rotate, so that the raw materials are unrolled and cut by the slitting mechanism. The slitting mechanism usually consists of upper and lower disc knives. According to the set width requirements, the gap between the upper and lower disc knives can be adjusted to cut the raw materials into multiple narrow-width materials. The cut materials are then reeled through the reel.

[0003] In the prior art, when a slitting machine slits a film material, the entire sheet of material is often cut into multiple narrow strips of material to facilitate the subsequent production of packaging bags. However, when multiple narrow strips of material are rolled into multiple narrow rolls at the same time, there will be insufficient winding space, resulting in poor adaptability and poor practicality. Summary of the invention

[0004] The embodiment of the present invention provides a trimming and collecting device for a slitting machine, aiming to solve the problem that the edges of the existing narrow-width materials are easily worn when the multiple narrow-width materials are rolled into a roll.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a slitting machine trimming and collecting device, comprising: frame; A conveying mechanism, arranged on the frame, having a conveying channel for conveying materials; A slitting mechanism, arranged above the conveying passage, having a slitting portion movable in a vertical direction, the slitting portion being used to slit a wide-width material into a plurality of narrow-width materials; A guide mechanism is provided at the outlet of the conveying passage and is used to guide the plurality of narrow width materials after slitting so that each narrow width material is conveyed at intervals and in a staggered manner; The winding mechanism comprises a plurality of material receiving parts corresponding to each narrow width one by one, and each of the material receiving parts is staggered in the vertical direction.

[0006] In a possible implementation, the conveying direction of the wide-width material is set as a first direction, and a direction that is horizontal and vertical to the first direction is set as a second direction; The guiding mechanism comprises: A plurality of connecting structures are provided, wherein the plurality of connecting structures are arranged in the conveying passage at intervals along the second direction, and each of the connecting structures has two coaxially arranged rotating parts, and when one of the rotating parts rotates, the other rotating part rotates in the opposite direction; There are two rotating disks, which are arranged at intervals on both sides of each connecting structure along the second direction and are rotatably connected to the frame; the rotation axis of each rotating disk is colinear with the rotation axis of each rotating part, and a plurality of connecting spaces are formed between each rotating disk and each connecting structure; There are multiple guide assemblies, each of which is arranged in each of the connecting spaces; each of the guide assemblies has a guide opening for a single narrow width to pass through; the guide openings on any two adjacent guide assemblies are arranged in a mirror image along the horizontal plane where the axis of the rotating disk is located; A driving motor is connected to one of the rotating disks and is used to drive the corresponding rotating disk to rotate.

[0007] In a possible implementation, each of the connection structures includes: A connecting frame, fixed on the frame, with a mounting position on the top; There are two rotating cover plates, which are spaced apart along the second direction and are both rotatably connected to the mounting position; each rotating cover plate is provided with a flange arranged toward the other rotating cover plate at its outer edge, and the inner wall surface of the flange is an inner tooth surface, and the two rotating cover plates are two rotating parts; A first gear, rotatably connected to a first support rod extending from the connecting frame into between the two rotating cover plates, the first gear meshing with an inner tooth surface of one of the rotating cover plates; The second gear is rotatably connected to the second support rod extending from the connecting frame between the two rotating cover plates, the second gear is meshed with the inner tooth surface of the other rotating cover plate, and the second gear is meshed with the first gear, and is used to drive the first gear and the second gear to rotate when one of the rotating cover plates rotates, so as to make the other rotating cover plate rotate in the opposite direction.

[0008] In a possible implementation, each of the guide assemblies includes two guide rollers, which are arranged in a ring-shaped interval around the rotation axis of the rotating cover plate, and the ends of each guide roller are rotatably connected to the corresponding rotating cover plates on two adjacent connecting structures, or are connected to the connecting structure at the edge and the corresponding rotating disk, and the connecting space is formed between the two guide rollers.

[0009] In a possible implementation, the slitting mechanism includes: There are two connecting blocks, the two connecting blocks are arranged on the frame at intervals along the second direction, and each connecting block is slidably arranged on the frame along the vertical direction; A slitting roller is arranged along the second direction, and the two ends are respectively rotatably connected to the two connecting blocks, and move along the vertical direction with the two connecting blocks. The slitting roller is provided with a plurality of slitting cutter wheels, and each of the slitting cutter wheels is slidably arranged on the slitting roller along the second direction; The first telescopic structure is used to drive the connecting block to slide in a vertical direction.

[0010] In a possible implementation, the conveying mechanism includes: There are two driving structures, the two driving structures are arranged on the frame at intervals along the first direction, each driving structure has a conveying space for materials to pass through, and the two conveying spaces together constitute the conveying channel; The tensioning structure is arranged on the frame and has a tensioning channel for tensioning the material and for the material to pass through in a serpentine shape.

[0011] In a possible implementation, each of the driving structures includes: A driving roller, rotatably arranged on the frame along the second direction; An auxiliary roller is rotatably arranged on the frame along the second direction and is spaced apart from the driving roller along the vertical direction; A driver is used to drive the driving roller to rotate.

[0012] In a possible implementation, the tensioning structure includes: A plurality of fixed rollers are provided, wherein the plurality of fixed rollers are arranged on the frame at intervals along the first direction and are all rotatably connected to the frame; There are two adjustment plates, the two adjustment plates are spaced apart along the second direction, and are both slidably connected to the frame along the vertical direction. A plurality of tensioning rollers are provided, the plurality of tensioning rollers are arranged at intervals along the first direction, both ends of each tensioning roller are rotatably connected to the two adjustment plates, and each tensioning roller is staggered with each fixed roller; The second telescopic structure is used to drive the adjustment plate to slide in a vertical direction.

[0013] In a possible implementation, the winding mechanism includes: A plurality of first receiving rollers are provided, and the plurality of first receiving rollers are arranged at intervals along the second direction; There are multiple second receiving rollers, and the multiple second receiving rollers are spaced apart along the second direction. Each second receiving roller is arranged between two adjacent first receiving rollers, and each first receiving roller and two adjacent second receiving rollers are spaced apart along the vertical direction.

[0014] In this implementation, compared with the prior art, a frame is provided, and a conveying mechanism is provided on the frame, and materials can be conveyed through a conveying channel provided thereon; a slitting mechanism is provided above the conveying channel, and wide-width materials can be slit into multiple narrow-width materials; a guiding mechanism is provided at the outlet of the conveying channel, and the multiple narrow-width materials after slitting can be guided so that each narrow-width material can be conveyed in an offset manner; a winding mechanism is provided, and the multiple narrow-width materials guided by the guiding mechanism can be staggered and wound; the problem of insufficient winding space can be solved, and the adaptability and practicality are good. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a trimming and collecting device for a slitting machine provided in an embodiment of the present invention; Figure 2 A schematic diagram of a conveying structure of a trimming and receiving device of a slitting machine provided in an embodiment of the present invention; Figure 3 A schematic diagram of a front and cross-sectional structure of a connection structure of a trimming and receiving device of a slitting machine provided in an embodiment of the present invention; Figure 4 A schematic diagram of a top view and cross-section of a connection structure of a trimming and receiving device of a slitting machine provided in an embodiment of the present invention; Description of reference numerals: 10. Frame; 20. Conveying mechanism; 21. Driving structure; 211. Driving roller; 212. Auxiliary roller; 213. Driver; 22. Tensioning structure; 221. Fixed roller; 222. Adjusting plate; 223. Tensioning roller; 224. Second telescopic structure; 30. Slitting mechanism; 31. Connecting block; 32. Slitting roller; 321. Slitting wheel; 40. Guide mechanism; 41. Connecting structure; 411. Connecting frame; 412. Rotating cover plate; 413. First gear; 414. Second gear; 42. Rotating disk; 43. Guide assembly; 431. Guide roller; 44. Driving motor; 50. Winding mechanism; 51. First receiving roller; 52. Second receiving roller. DETAILED DESCRIPTION

[0016] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0017] Please also read Figures 1 to 4 , the trimming and receiving device for a slitting machine provided by the present invention is now described. The trimming and receiving device for a slitting machine comprises a frame 10, a conveying mechanism 20, a slitting mechanism 30, a guiding mechanism 40 and a winding mechanism 50. Frame 10. The conveying mechanism 20 is arranged on the frame 10, and has a conveying channel for conveying materials. The slitting mechanism 30 is arranged above the conveying channel, and has a slitting part that can move in a vertical direction, and the slitting part is used to slit a wide material into a plurality of narrow materials. The guiding mechanism 40 is arranged at the exit of the conveying channel, and is used to guide the plurality of narrow materials after slitting, so that each narrow material is conveyed at intervals and staggered. The winding mechanism 50 has a plurality of receiving parts corresponding to each narrow material, and each receiving part is staggered in the vertical direction.

[0018] Compared with the prior art, the trimming and collecting device for the slitting machine provided in this embodiment is provided with a frame 10, on which a conveying mechanism 20 is provided, and the material can be conveyed through a conveying channel provided thereon. A slitting mechanism 30 is provided above the conveying channel, and a wide material can be slit into a plurality of narrow materials. A guiding mechanism 40 is provided at the exit of the conveying channel, and the plurality of narrow materials after slitting can be guided so that each narrow material can be conveyed at intervals and staggered. A winding mechanism 50 is provided, and the plurality of narrow materials guided by the guiding mechanism 40 can be staggered and wound. The problem of insufficient winding space can be solved, and the adaptability and practicality are good.

[0019] In some embodiments, the guide mechanism 40 may be configured as follows: Figure 2 See the structure shown. Figure 2 , the conveying direction of the wide-width material is set as the first direction, and the direction horizontal and vertical to the first direction is set as the second direction.

[0020] The guide mechanism 40 includes: a connection structure 41, a rotating disk 42, a guide assembly 43 and a drive motor 44. There are multiple connection structures 41, which are arranged in the conveying channel at intervals along the second direction. Each connection structure 41 has two coaxially arranged rotating parts, and when one rotating part rotates, the other rotating part rotates in the opposite direction. There are two rotating disks 42, which are arranged at intervals on both sides of each connection structure 41 along the second direction and are rotatably connected to the frame 10. The rotation axis of each rotating disk 42 is colinear with the rotation axis of each rotating part, and multiple connection spaces are formed between each rotating disk 42 and each connection structure 41. There are multiple guide assemblies 43, which are arranged one by one in each connection space. Each guide assembly 43 has a guide opening for a single narrow width to pass through. The guide openings on any two adjacent guide assemblies 43 are arranged in a mirror image along the horizontal plane where the axis of the rotating disk 42 is located. The drive motor 44 is connected to one of the rotating disks 42 to drive the corresponding rotating disk 42 to rotate.

[0021] The connecting structure 41 can rotate in the opposite direction when one rotating part rotates, which can be understood as two coaxially arranged rotating parts, when one rotating part rotates 30°, the other rotating part rotates -30°. Two rotating disks 42 can be arranged at intervals on both sides of the plurality of connecting structures 41 along the second direction, and each rotating disk 42 is rotatably connected to the frame 10. The guide assembly 43 can be arranged on any two adjacent guide assemblies 43, or can be arranged between one rotating disk 42 and its adjacent guide assembly 43, and rotate therewith. The driving motor 44 can drive the corresponding rotating disk 42 to rotate, so as to achieve the rotation of each guide assembly 43, each rotating part and the rotating disk 42.

[0022] It should be noted that the drive motor 44 may be a servo motor, which is an actuator in an automatic control system and is used to convert an electrical signal into a mechanical motion. The servo motor is a prior art and will not be described in detail here.

[0023] In some embodiments, the connection structure 41 may be configured as follows: Figure 2 See the structure shown. Figure 2 , each connecting structure 41 includes: a connecting frame 411, a rotating cover plate 412, a first gear 413 and a second gear 414. The connecting frame 411 is fixed on the frame 10, and has a mounting position on the top. There are two rotating cover plates 412, and the two rotating cover plates 412 are arranged at intervals along the second direction, and are both rotatably connected to the mounting position. Each rotating cover plate 412 is provided with a flange facing the other rotating cover plate 412 at the outer edge, and the inner wall surface of the flange is an inner tooth surface, and the two rotating cover plates 412 are two rotating parts. The first gear 413 is rotatably connected to the first support rod extending from the connecting frame 411 between the two rotating cover plates 412, and the first gear 413 is meshed with the inner tooth surface of one of the rotating cover plates 412. The second gear 414 is rotatably connected to the second support rod that extends from the connecting frame 411 into between the two rotating cover plates 412. The second gear 414 meshes with the inner tooth surface of the other rotating cover plate 412. The second gear 414 meshes with the first gear 413, and is used to drive the first gear 413 and the second gear 414 to rotate when one of the rotating cover plates 412 rotates, so that the other rotating cover plate 412 rotates in the opposite direction.

[0024] The connecting frame 411 , the rotating cover plate 412 , the first gear 413 and the second gear 414 can drive the first gear 413 and the second gear 414 to rotate when one of the rotating cover plates 412 rotates, so that the other rotating cover plate 412 rotates in the opposite direction.

[0025] In some embodiments, the guide assembly 43 may be configured as follows: Figure 2 See the structure shown. Figure 2Each guide assembly 43 includes two guide rollers 431, and the two guide rollers 431 are arranged in a ring-shaped interval around the rotation axis of the rotating cover plate 412. The end of each guide roller 431 is rotatably connected to the corresponding rotating cover plates 412 on two adjacent connecting structures 41, or is connected to the edge connecting structure 41 and the corresponding rotating disk 42, and a connecting space is formed between the two guide rollers 431.

[0026] The two guide rollers 431 can rotate along with the connected rotating cover plate 412 and the rotating disk 42 , and the two guide rollers 431 can adjust the tension of the narrow width material passing through the two guide rollers 431 by rotating.

[0027] In some embodiments, the slitting mechanism 30 may be configured as follows: Figure 2 See the structure shown. Figure 2 The slitting mechanism 30 includes: a connecting block 31, a slitting roller 32 and a first telescopic structure. Two connecting blocks 31 are provided, and the two connecting blocks 31 are arranged on the frame 10 at intervals along the second direction. Each connecting block 31 is slidably arranged on the frame 10 along the vertical direction. The slitting roller 32 is arranged along the second direction, and the two ends are respectively rotated to connect the two connecting blocks 31, and move along the vertical direction with the two connecting blocks 31. The slitting roller 32 is provided with a plurality of slitting cutter wheels 321, and each slitting cutter wheel 321 is slidably arranged on the slitting roller 32 along the second direction. The first telescopic structure is used to drive the connecting block 31 to slide in the vertical direction.

[0028] The first telescopic structure can drive the connecting block 31 to slide in the vertical direction, thereby driving the slitting roller 32 to slide in the vertical direction. The slitting roller 32 can cut the wide material through a plurality of slitting wheels 321 arranged thereon.

[0029] A preferred embodiment is that the multiple slitting wheels 321 on the slitting roller 32 can be detachably connected to the slitting roller 32 .

[0030] In some embodiments, the conveying mechanism 20 may be configured as follows: Figure 2 See the structure shown. Figure 2 The conveying mechanism 20 includes: a driving structure 21 and a tensioning structure 22. Two driving structures 21 are provided, and the two driving structures 21 are arranged on the frame 10 at intervals along the first direction. Each driving structure 21 has a conveying space for the material to pass through, and the two conveying spaces together constitute a conveying channel. The tensioning structure 22 is arranged on the frame 10, and has a tensioning channel for tensioning the material and for the material to pass through in a serpentine shape.

[0031] In some embodiments, the driving structure 21 may be configured as follows: Figure 2 See the structure shown. Figure 2Each driving structure 21 includes: a driving roller 211, an auxiliary roller 212 and a driver 213. The driving roller 211 is rotatably arranged on the frame 10 along the second direction. The auxiliary roller 212 is rotatably arranged on the frame 10 along the second direction and is spaced apart from the driving roller 211 in the vertical direction. The driver 213 is used to drive the driving roller 211 to rotate.

[0032] In some embodiments, the tensioning structure 22 may be configured as follows: Figure 2 See the structure shown. Figure 2 The tensioning structure 22 includes: a fixed roller 221, an adjustment plate 222, a tensioning roller 223 and a second telescopic structure 224. There are multiple fixed rollers 221, which are arranged on the frame 10 at intervals along the first direction and are all rotatably connected to the frame 10. There are two adjustment plates 222, which are arranged at intervals along the second direction and are both slidably connected to the frame 10 in the vertical direction. There are multiple tensioning rollers 223, which are arranged at intervals along the first direction, and both ends of each tensioning roller 223 are rotatably connected to the two adjustment plates 222, and each tensioning roller 223 is staggered with each fixed roller 221. The second telescopic structure 224 is used to drive the adjustment plate 222 to slide in the vertical direction.

[0033] In some embodiments, the winding mechanism 50 may be configured as follows: Figure 2 See the structure shown. Figure 2 The winding mechanism 50 includes: a first receiving roller 51 and a second receiving roller 52. A plurality of first receiving rollers 51 are provided, and the plurality of first receiving rollers 51 are arranged at intervals along the second direction. A plurality of second receiving rollers 52 are provided, and the plurality of second receiving rollers 52 are arranged at intervals along the second direction, and each second receiving roller 52 is arranged between two adjacent first receiving rollers 51, and each first receiving roller 51 and two adjacent second receiving rollers 52 are arranged at intervals along the vertical direction.

[0034] The first receiving roller 51 and the second receiving roller 52 are both connected to a driving unit.

[0035] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. The trimming and collecting device of the slitting machine is characterized by: include: frame; A conveying mechanism, arranged on the frame, having a conveying channel for conveying materials; A slitting mechanism, arranged above the conveying passage, having a slitting portion movable in a vertical direction, the slitting portion being used to slit a wide-width material into a plurality of narrow-width materials; A guide mechanism is provided at the outlet of the conveying passage and is used to guide the plurality of narrow width materials after slitting so that each narrow width material is conveyed at intervals and in a staggered manner; The winding mechanism comprises a plurality of material receiving parts corresponding to each narrow width one by one, and each of the material receiving parts is staggered in the vertical direction.

2. The trimming and collecting device for a slitting machine according to claim 1, characterized in that: The conveying direction of the wide-width material is set as a first direction, and a direction horizontal and vertical to the first direction is set as a second direction; The guiding mechanism comprises: A plurality of connecting structures are provided, wherein the plurality of connecting structures are arranged in the conveying passage at intervals along the second direction, and each of the connecting structures has two coaxially arranged rotating parts, and when one of the rotating parts rotates, the other rotating part rotates in the opposite direction; There are two rotating disks, which are arranged at intervals on both sides of each connecting structure along the second direction and are rotatably connected to the frame; the rotation axis of each rotating disk is colinear with the rotation axis of each rotating part, and a plurality of connecting spaces are formed between each rotating disk and each connecting structure; There are multiple guide assemblies, each of which is arranged in each of the connecting spaces; each of the guide assemblies has a guide opening for a single narrow width to pass through; the guide openings on any two adjacent guide assemblies are arranged in a mirror image along the horizontal plane where the axis of the rotating disk is located; A driving motor is connected to one of the rotating disks and is used to drive the corresponding rotating disk to rotate.

3. The trimming and collecting device for a slitting machine according to claim 2, characterized in that: Each of the connection structures comprises: A connecting frame, fixed on the frame, with a mounting position on the top; There are two rotating cover plates, which are spaced apart along the second direction and are both rotatably connected to the mounting position; each rotating cover plate is provided with a flange arranged toward the other rotating cover plate at its outer edge, and the inner wall surface of the flange is an inner tooth surface, and the two rotating cover plates are two rotating parts; A first gear, rotatably connected to a first support rod extending from the connecting frame into between the two rotating cover plates, the first gear meshing with an inner tooth surface of one of the rotating cover plates; The second gear is rotatably connected to the second support rod extending from the connecting frame between the two rotating cover plates, the second gear is meshed with the inner tooth surface of the other rotating cover plate, and the second gear is meshed with the first gear, and is used to drive the first gear and the second gear to rotate when one of the rotating cover plates rotates, so as to make the other rotating cover plate rotate in the opposite direction.

4. The trimming and collecting device for a slitting machine according to claim 3, characterized in that: Each of the guide assemblies comprises two guide rollers, which are arranged in a ring-shaped interval around the rotation axis of the rotating cover plate. The ends of each of the guide rollers are rotatably connected to the corresponding rotating cover plates on two adjacent connecting structures, or are connected to the connecting structure at the edge and the corresponding rotating disk, and the connecting space is formed between the two guide rollers.

5. The trimming and collecting device for a slitting machine according to claim 2, characterized in that: The slitting mechanism comprises: There are two connecting blocks, the two connecting blocks are arranged on the frame at intervals along the second direction, and each connecting block is slidably arranged on the frame along the vertical direction; A slitting roller is arranged along the second direction, and the two ends are respectively rotatably connected to the two connecting blocks, and move along the vertical direction with the two connecting blocks. The slitting roller is provided with a plurality of slitting cutter wheels, and each of the slitting cutter wheels is slidably arranged on the slitting roller along the second direction; The first telescopic structure is used to drive the connecting block to slide in a vertical direction.

6. The trimming and collecting device for a slitting machine according to claim 2, characterized in that: The conveying mechanism comprises: There are two driving structures, the two driving structures are arranged on the frame at intervals along the first direction, each driving structure has a conveying space for materials to pass through, and the two conveying spaces together constitute the conveying channel; The tensioning structure is arranged on the frame and has a tensioning channel for tensioning the material and for the material to pass through in a serpentine shape.

7. The trimming and collecting device for a slitting machine according to claim 6, characterized in that: Each of the driving structures comprises: A driving roller, rotatably arranged on the frame along the second direction; An auxiliary roller is rotatably arranged on the frame along the second direction and is spaced apart from the driving roller along the vertical direction; A driver is used for driving the driving roller to rotate.

8. The trimming and collecting device for a slitting machine according to claim 6, characterized in that: The tensioning structure comprises: A plurality of fixed rollers are provided, wherein the plurality of fixed rollers are arranged on the frame at intervals along the first direction and are all rotatably connected to the frame; There are two adjustment plates, the two adjustment plates are spaced apart along the second direction, and are both slidably connected to the frame along the vertical direction. A plurality of tensioning rollers are provided, the plurality of tensioning rollers are arranged at intervals along the first direction, both ends of each tensioning roller are rotatably connected to the two adjustment plates, and each tensioning roller is staggered with each fixed roller; The second telescopic structure is used to drive the adjustment plate to slide in a vertical direction.

9. The trimming and collecting device for a slitting machine according to claim 2, characterized in that: The reeling mechanism comprises: A plurality of first receiving rollers are provided, and the plurality of first receiving rollers are arranged at intervals along the second direction; There are multiple second receiving rollers, and the multiple second receiving rollers are spaced apart along the second direction. Each second receiving roller is arranged between two adjacent first receiving rollers, and each first receiving roller and two adjacent second receiving rollers are spaced apart along the vertical direction.

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