Adjustable distance multi-circular knife paper cutter

Abstract

The utility model belongs to paper cutting machine technical field, specifically disclose a spacing adjustable multi -convolution cutter paper cutting machine, including workbench, be equipped with two conveying lines in workbench, be equipped with the adjusting seat below two conveying lines, be equipped with a plurality of tool holders between two conveying lines, all tool holders are connected on adjusting seat and slide in a row horizontally, one cutting knife is rotatably connected on each tool holder, all cutting knives are set between two conveying lines in a row, be equipped with the pushing device above two conveying lines, be equipped with the adjusting device for adjusting all cutting knives spacing in adjusting seat. The utility model pushes the paper towel blank on one conveying line to the tool holder with pushing device and carries out cutting, pushes to another conveying line again and carries out the unloading, has realized to long strip paper towel blank's disposable multi -knife cutting, and can according to different production needs flexible adjustment cutting knife's spacing to greatly improve production efficiency, cutting precision, production flexibility and automation level.

Description

Technical Field

[0001] This utility model belongs to the technical field of paper cutting machine, and in particular relates to a multi-rotary knife paper cutter with adjustable spacing. Background Technology

[0002] In daily life and business activities, the demand for facial tissues, as a convenient and hygienic paper product, is increasing daily. Facial tissues are typically made by cutting a long stack of tissue blanks into multiple smaller tissue units, which are then further processed and packaged. Therefore, efficient, precise, and flexible paper cutting equipment is crucial for the facial tissue manufacturing industry.

[0003] Currently, existing paper cutters on the market have certain limitations in structural design and functional implementation. Most existing paper cutters are only equipped with a single cutting blade, and this single-blade design presents many problems when processing long strips of paper towel blanks.

[0004] From a production efficiency perspective, a single-blade paper cutter can only complete one cutting action at a time, cutting a long strip of tissue paper blank into two parts. If the tissue paper blank is to be cut into multiple small units for making facial tissues, the cutting operation needs to be repeated many times. This not only increases production time and reduces production efficiency, but also makes the equipment prone to wear and tear and malfunctions during frequent cutting, further affecting the continuity and stability of production.

[0005] In terms of cutting precision, single-blade paper cutters struggle to meet diverse production needs. Because tissue paper products come in a wide variety of specifications and sizes, different customers have varying requirements for the size and shape of the tissues. Single-blade paper cutters cannot flexibly adjust the cutting position and spacing. For the production of some special-sized tissues, it is often necessary to customize special blades or use other auxiliary methods. This not only increases production costs but also extends the production cycle, making it difficult to adapt to rapidly changing market demands.

[0006] Furthermore, existing single-blade paper cutters need improvement in terms of ease of operation and automation. During the cutting process, manual assistance is usually required, such as adjusting the position of the paper towel blank and controlling the cutting rhythm. This not only increases labor intensity but also easily leads to cutting errors due to human factors, affecting product quality. Moreover, single-blade paper cutters struggle to achieve efficient automated production processes when handling large quantities of paper towel blanks, and cannot effectively connect and coordinate with upstream and downstream production equipment.

[0007] Therefore, the inventors dedicated themselves to designing a cutting machine to solve the above problems. Utility Model Content

[0008] The purpose of this invention is to provide a multi-rotary knife paper cutter with adjustable spacing, which improves the efficiency, cutting accuracy and automation level of tissue paper production, and meets the market demand for diversified tissue paper products.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A multi-rotary paper cutter with adjustable spacing includes a workbench frame with two conveyor lines spaced apart within it. An adjustment seat is located below the two conveyor lines, and multiple blade holders are positioned between them. All blade holders are slidably connected to the adjustment seat in a row. Each blade holder has a cutting blade rotatably connected to it. All cutting blades are arranged in a row between the two conveyor lines. Above the two conveyor lines is a pushing device for pushing paper towel blanks from one conveyor line onto the blade holders for cutting and then pushing them onto the other conveyor line. The adjustment seat contains an adjustment device for adjusting the spacing between all the cutting blades.

[0010] As an improvement of the present invention, the adjustable spacing multi-rotary knife paper cutter includes a telescopic screw and a telescopic adjustment component. The telescopic screw is rotatably disposed in the adjustment seat. The first and last two knife holders are respectively threadedly connected to the telescopic screw through connecting blocks. All the knife holders are telescopically connected through the telescopic adjustment component to adjust the spacing of all the knife holders.

[0011] As an improvement of the adjustable-spacing multi-rotary knife paper cutter of this utility model, each of the knife holders is provided with a pair of movable rods, the same pair of movable rods are arranged crosswise and their intersection point is hinged to the knife holder, and the telescopic adjustment member is formed by hinged end to end of all the pairs of movable rods in sequence.

[0012] As an improvement to the multi-rotary knife paper cutter with adjustable spacing of this utility model, the first and last pairs of movable rods are arranged in a V-shape, and each other pair of movable rods is arranged in an X-shape.

[0013] As an improvement of the adjustable-spacing multi-rotary knife paper cutter of this utility model, the adjustment seat includes a seat body and a cover plate. The top of the seat body is open, and the cover plate is fixed to the top of the seat body and forms a sliding space between the cover plate and the seat body.

[0014] As an improvement of the present invention, the lower end of the knife holder is sleeved on the cover plate and slidably connected to the sliding rail on the base body, and the sliding rail is located in the sliding space.

[0015] As an improvement of the adjustable-spacing multi-rotary knife paper cutter of this utility model, the knife holder includes a slide and a pair of knife holders. The slide is slidably disposed on the adjusting seat, and the pair of knife holders are fixedly spaced on the slide. The cutting knife is rotatably disposed between the pair of knife holders. The part of each knife holder used to connect the cutting knife is T-shaped and a guide plate is formed on its top. The conveying surfaces of the two conveying lines are connected by the guide plate and the conveying surfaces are flush.

[0016] As an improvement of the adjustable-spacing multi-rotary knife paper cutter of this utility model, each of the knife holders is longitudinally slidably connected to a grinding seat, and two corresponding side walls of the grinding seat are respectively rotatably connected to grinding wheels for grinding the cutting blade, and the cutting blade is located between the two grinding wheels.

[0017] As an improvement of the adjustable-spacing multi-rotary knife paper cutter of this utility model, the feeding device includes a slide rod, a connecting strip and multiple paper pressing strips. The slide rod is longitudinally slidably disposed within the workbench frame, the connecting strip is vertically slidably disposed on the slide rod, and all the paper pressing strips are fixed at intervals on the connecting strip and are offset from all the cutting blades.

[0018] As an improvement of the adjustable-spacing multi-rotary knife paper cutter of this utility model, two swing arms are spaced apart inside the workbench frame. The adjusting seat is located between the two swing arms and is fixedly connected to the middle of the two swing arms. One end of the two swing arms is hinged to the workbench frame. A rotating shaft is rotatably connected inside the workbench frame. Swing arms are fixedly sleeved at both ends of the rotating shaft. The ends of the two swing arms away from the rotating shaft are respectively hinged to the other ends of the two swing arms through connecting rods to control the adjusting seat, the knife holder and the cutting knife to rise and fall together.

[0019] Compared with existing technologies, this utility model of a multi-rotary knife paper cutter with adjustable spacing features two conveyor lines spaced apart within the workbench, with multiple laterally adjustable knife holders between them. Each knife holder is rotatably connected to a cutting blade and is equipped with a pushing device and an adjusting device. The pushing device pushes the tissue paper blank from one conveyor line onto the knife holder for cutting, and then pushes it onto the other conveyor line for unloading. This achieves one-time multi-blade cutting of long strip tissue paper blanks and allows for flexible adjustment of the cutting blade spacing according to different production needs. This greatly improves production efficiency, cutting accuracy, production flexibility, and automation level, providing a more efficient and high-quality paper cutting solution for the tissue paper manufacturing industry and meeting the market's demand for diversified tissue paper products. Attached Figure Description

[0020] Figure 1 This is a perspective view of the first embodiment of the multi-rotary knife paper cutter with adjustable spacing of the present invention; Figure 2 This is another perspective view of the multi-rotary knife paper cutter with adjustable spacing according to the first embodiment of this utility model; Figure 3 This is a three-dimensional enlarged view of the feeding device in the first embodiment of this utility model; Figure 4 This is another three-dimensional enlarged view of the feeding device in the first embodiment of this utility model; Figure 5 This is an enlarged three-dimensional view of the conveyor line in the first embodiment of this utility model; Figure 6 This is a three-dimensional enlarged view of the adjustment seat, adjustment device, knife holder and cutting knife in the first embodiment of this utility model; Figure 7 This is an enlarged cross-sectional view of the adjusting seat, adjusting device, knife holder and cutting knife in the assembled state in the first embodiment of this utility model; Figure 8 yes Figure 7 Enlarged view of point A in the middle; Figure 9 This is another enlarged cross-sectional view of the first embodiment of the present invention, showing the adjusting seat, adjusting device, knife holder and cutting knife in an assembled state; Figure 10 This is a perspective enlarged view of the adjusting seat and adjusting device in the first embodiment of this utility model; Figure 11 yes Figure 10 Enlarged view of point B in the middle; Figure 12 yes Figure 10 Enlarged view of point C in the middle; Figure 13 This is a perspective enlarged view of the knife holder, cutting knife, and grinding device in the first embodiment of this utility model; Figure 14 This is another perspective enlarged view of the knife holder, cutting knife, and sharpening device in the first embodiment of this utility model; Figure 15 This is a three-dimensional enlarged view of the tool holder in the first embodiment of this utility model; Figure 16 This is a perspective view of the second embodiment of the present invention, a multi-rotary knife paper cutter with adjustable spacing; Figure 17 This is another perspective view of the adjustable-spacing multi-rotary knife paper cutter according to the second embodiment of this utility model; Figure 18 This is a three-dimensional enlarged view of the adjustment seat, two swing rods, two connecting rods, two swing arms and rotating shaft in the second embodiment of this utility model; Figure 19 yes Figure 18 Enlarged view of point D in the middle.

[0021] Illustration: 1. Workbench frame; 11. Slide rail; 2. Feeding conveyor line; 21. Discharging conveyor line; 22. Conveyor belt; 23. Conveyor motor; 231. Driven roller; 232. Driven roller; 233. Guide roller; 24. Support block; 3. Adjusting seat; 31. Cover plate; 32. Seat body; 321. Sliding rail; 4. Pushing device; 41. Pushing motor; 42. First belt; 421. First drive wheel; 422. First driven wheel; 43. Second belt; 431. Second drive wheel; 432. Second driven wheel; 44. Connecting shaft; 45. Slide rod; 451. Connecting bar; 452. Paper pressing strip; 453. Sliding rail; 46. Pressing air 47. Cylinder; 471. Fixed shaft; 472. First movable rod; 473. Second movable rod; 48. Hinge shaft; 5. Telescopic lead screw; 51. Telescopic motor; 52. Adjusting device; 53. Telescopic adjusting component; 6. Tool holder; 61. Tool post; 611. Guide plate; 612. Tool hole; 62. Slide seat; 621. Top cover; 622. Slider; 63. Connecting block; 7. Cutting knife; 71. Cutting motor; 8. Grinding knife holder; 81. Grinding knife motor; 82. Grinding knife lead screw; 83. Grinding wheel; 9. Paper towel blank; 91. Lifting motor; 92. Reducer; 921. Rotating shaft; 93. Swing arm; 94. Connecting rod; 95. Swing arm; 951. Rotating shaft. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below with reference to the accompanying drawings. The drawings are for reference and illustration only and do not constitute a limitation on the scope of patent protection of this utility model.

[0023] Example 1

[0024] Reference Figures 1 to 15 This is the first embodiment of the present invention. The multi-rotary paper cutter with adjustable spacing in this embodiment includes a workbench 1, two conveyor lines, an adjusting seat 3, a pushing device 4, an adjusting device 52, and multiple cutter holders 6. The two conveyor lines are spaced apart in the workbench 1. The adjusting seat 3 is located below the two conveyor lines. All cutter holders 6 are located between the two conveyor lines and are slidably connected to the adjusting seat 3 in a row. Each cutter holder 6 is rotatably connected to a cutting blade 7. All cutting blades 7 are arranged in a row between the two conveyor lines. Above the two conveyor lines is a pushing device 4 for pushing the paper towel blank 9 on one conveyor line to the cutter holder 6 for cutting and then pushing it to the other conveyor line. The adjusting device 52 is located in the adjusting seat 3 and is used to adjust the spacing of all cutting blades 7.

[0025] Reference Figure 1 and Figure 2The workbench 1 is formed by fixing multiple long rods and is in the shape of a cuboid. In this utility model, the horizontal direction of the workbench 1 is the X-axis direction, the vertical direction of the workbench 1 is the Z-axis direction, and the longitudinal direction of the workbench 1 is the Y-axis direction. The adjusting seat 3 is fixed to the lower end of the interior of the workbench 1 and is arranged along the horizontal direction of the workbench 1. A slide rail 11 is fixed longitudinally at both ends of the workbench 1. The adjusting seat 3 includes a body 32 and a cover plate 31. The top of the body 32 is open. The cross-section of 2 is U-shaped. The height of the left and right side walls of the seat 32 is greater than the height of its front and rear side walls. The front and rear side walls of the seat 32 are long strips and are arranged along the transverse direction of the workbench 1. A sliding rail 321 is fixed at the top of the front and rear side walls of the seat 32 along its length. The cover plate 31 is long strips and is arranged along the transverse direction of the workbench 1. The cover plate 31 is fixed to the top of the seat 32 and forms a sliding space between it and the seat 32. Both sliding rails 321 are located in the sliding space.

[0026] Reference Figures 6 to 15 All tool holders 6 have the same structure. The structure of one tool holder 6 will be described below. Each tool holder 6 includes a slide 62 and a pair of tool posts 61. The slide 62 is generally frame-shaped and is fitted onto the cover plate 31 and slidably mounted on the two sliding rails 321 of the adjusting seat 3. Specifically, the slide 62 includes a U-shaped slider 622 and an upper cover 621. The upper cover 621 is plate-shaped and covers the top of the slider 622 to form a frame. The bottom of the slider 622 slidably engages with the two sliding rails 321 so that the tool holder 6... The lower end is fitted onto the cover plate 31 and slidably connected to the sliding rail 321 on the seat 32. A pair of knife holders 61 are fixed at intervals on the top of the slide block 62. Each knife holder 61 is arranged along the longitudinal direction of the workbench frame 1. The cutting knife 7 is rotatably arranged between the pair of knife holders 61. The part on each knife holder 61 used to connect the cutting knife 7 is T-shaped and a guide plate 611 is formed on its top. The two guide plates 611 are arranged at intervals and form a knife hole 612. The conveying surfaces of the two conveying lines are connected by the guide plates 611 and the conveying surfaces are flush.

[0027] Reference Figure 13 and Figure 14 Each of the cutting blades 7 is circular and driven to rotate by a cutting motor 71, which is fixed on one of the blade holders 61. In this embodiment, the cutting motor 71 and the cutting blade 7 are located between the same pair of blade holders 61, and the cutting part at the upper end of the cutting blade 7 is located outside the entire blade holder 6.

[0028] Reference Figure 13 and Figure 14Each of the tool holders 6 is equipped with a sharpening device, which includes a sharpening base 8, a sharpening motor 81, a sharpening screw 82, and two grinding wheels 83. The sharpening base 8 is longitudinally slidably disposed on the tool holder 6. Specifically, the sharpening base 8 and the sharpening motor 81 are disposed on one of the tool holders 61. The sharpening base 8 is U-shaped and is slidably disposed along the longitudinal direction of the workbench frame 1 with the corresponding tool holder 61. The sharpening motor 81 is fixed on the corresponding tool holder 61. The sharpening screw 82 is located at the output end of the sharpening motor 81 and is threadedly connected to the sharpening base 8. The two grinding wheels 83 are rotatably disposed on two corresponding side walls of the sharpening base 8. The two grinding wheels 83 are used to sharpen the cutting blade 7, which is located between the two grinding wheels 83. Two grinding motors are disposed on the two outer walls of the sharpening base 8, and the two grinding wheels 83 are respectively located at the output ends of the two grinding motors.

[0029] Reference Figure 1 , Figure 2 , Figure 10 , Figure 11 and Figure 12The adjustment device 52 includes a telescopic lead screw 5, a telescopic adjustment component 53, and a telescopic motor 51. The telescopic motor 51 is fixed to one end of the tool holder 6. The telescopic lead screw 5 is rotatably mounted in the adjustment seat 3 along the transverse direction of the workbench frame 1. Specifically, the telescopic lead screw 5 is located inside the seat 32, and its two ends are rotatably connected to the left and right side walls of the seat 32, respectively. A connecting block 63 is fixed to the bottom of the first and last tool holders 6 (i.e., the first tool holder 6 on the left and the first tool holder 6 on the right). Both connecting blocks 63 are located inside the seat 32. The first and last tool holders 6 are threadedly connected to the telescopic lead screw 5 through the connecting blocks 63. All tool holders 6 are telescopically connected through the telescopic adjustment component 53 to adjust the spacing of all tool holders 6. Each tool holder 6 is provided with a pair of movable rods. Each movable rod is long and narrow. The same pair of movable rods are arranged crosswise, and their intersection point is hinged to the tool holder 6. The telescopic adjustment component 53 is formed by sequentially hinged all pairs of movable rods. The first and last pairs of movable rods are arranged in a V-shape, and each other pair of movable rods is arranged in an X-shape. In this embodiment, the first and last pairs of movable rods are specifically two pairs of first movable rods 471, and the other movable rods are specifically second movable rods 472. All second movable rods 472 are located between the two pairs of first movable rods 471. The pair of first movable rods 471 on the left (i.e., the first movable rods) intersect in a V-shape, and the intersection point is hinged to the fixed shaft 47 of the first tool holder 6 on the left. The pair of first movable rods 471 on the right also intersect in a V-shape, and the intersection point is hinged to the fixed shaft 47 of the first tool holder 6 on the right. The ends of the first movable rods 471 on the left are hinged to the second movable rods 472 on the left via hinge shafts 48. The ends of the first movable rods 471 on the right are hinged to the second movable rods 472 on the right via hinge shafts 48. Each pair of second movable rods 472 in the middle is X-shaped and the intersection point is hinged to the fixed shaft 47 of the corresponding tool holder 6. Adjacent pairs of second movable rods 472 are hinged to each other via two hinge shafts 48. All slides 62 are sleeved on the telescopic adjustment member 53.

[0030] Reference Figure 1 , Figure 2 and Figure 5The two conveyor lines are specifically a feeding conveyor line 21 and a feeding conveyor line 2. The feeding conveyor line 21 and the feeding conveyor line 2 are arranged sequentially from front to back within the workbench 1. Both the feeding conveyor line 21 and the feeding conveyor line 2 are arranged laterally along the workbench 1. All the sharpening devices are located directly below the feeding conveyor line 2. In this embodiment, the feeding conveyor line 21 and the feeding conveyor line 2 have the same structure. The structure of the feeding conveyor line 2 will now be described. The feeding conveyor line 2 includes a conveying motor 23, a driving roller 231, and three driven rollers 232. The system includes a guide roller 233 and a conveyor belt 22. The conveyor motor 23 is fixed on the workbench 1. The drive roller 231 is located at the output end of the conveyor motor 23. One driven roller 232 is located directly above the drive roller 231. The other two driven rollers 232 are located away from the drive roller 231. The guide roller 233 is located to the side of the drive roller 231. The conveyor belt 22 passes around the drive roller 231, the three driven rollers 232 and the guide roller 233. The support block 24 is long and horizontally fixed on the workbench 1. The conveyor belt 22 is sleeved on the support block 24.

[0031] Reference Figures 1 to 4The feeding device 4 includes a slide rod 45, a connecting strip 451, multiple paper pressing strips 452, two pressing cylinders 46, and two belt drive mechanisms. The slide rod 45 is elongated and arranged transversely along the workbench 1. The slide rod 45 is longitudinally slidably arranged within the workbench 1. Specifically, the slide rod 45 is located between two slide rails 11, and its left and right ends are slidably connected to the two slide rails 11 respectively. The connecting strip 451 is vertically slidably arranged on the slide rod 45, and a sliding rail 453 is vertically fixed at each end of the connecting strip 451. The moving rail 453 slides into two grooves on the slide rod 45. Two pressing cylinders 46 are fixedly spaced on the slide rod 45. The connecting bar 451 is located on the output shaft of the two pressing cylinders 46. All pressing strips 452 are fixedly spaced on the connecting bar 451 and are staggered from all the cutting blades 7. The pressing strips 452 are T-shaped and their lower ends form an L-shaped pressing opening. The pressing opening faces the pushing direction of the pressing strips 452 (i.e., forward). The slide rod 45 is driven to slide longitudinally by two linked belt drive mechanisms. The left belt drive mechanism... The driving mechanism includes a pusher motor 41, a first drive wheel 421, two first driven wheels 422, and a first belt 42. The pusher motor 41 is fixed to the left end of the workbench 1. The first drive wheel 421 is located on the output shaft of the pusher motor 41. One of the first driven wheels 422 is rotatably mounted on the left front end of the workbench 1, and the other first driven wheel 422 is rotatably mounted on the left rear end of the workbench 1. The first belt 42 is sleeved on the first drive wheel 421 and the two first driven wheels 422. The belt drive mechanism on the right side... It includes a second driving wheel 431, a second driven wheel 432, and a second belt 43. The second driving wheel 431 and the second driven wheel 432 are both rotatably mounted on the right end of the workbench frame 1. The second belt 43 is sleeved on the second driving wheel 431 and the second driven wheel 432. In order to link the left and right belt drive mechanisms, the first driven wheel 422 at the left rear end is fixedly connected to the second driving wheel 431 through a connecting shaft 44. The left and right ends of the slide rod 45 are fixedly connected to the first belt 42 and the second belt 43, respectively.

[0032] Reference Figures 1 to 15 The working principle of this utility model of a multi-rotary knife paper cutter with adjustable spacing is as follows: In the feeding conveyor line 2, the conveyor motor 23 drives the drive roller 231 to rotate, and the drive roller 231 drives the conveyor belt 22 to run, conveying the long strip of paper towel blank 9 on the conveyor belt 22 to the area directly below the multiple paper pressing strips 452; Two pressing cylinders 46 jointly drive the connecting bar 451 to move downward, and all the pressing strips 452 move downward together with the connecting bar 451 until all the pressing strips 452 press down the paper towel blank 9 on the feeding conveyor line 2. The pusher motor 41 drives the first drive wheel 421 to rotate. The first drive wheel 421 drives the two first driven wheels 422 to rotate through the first belt 42. The first driven wheel 422 at the left rear end drives the second drive wheel 431 to rotate through the connecting shaft 44. The second drive wheel 431 drives the second driven wheel 432 to rotate through the second belt 43. At this time, the first belt 42 and the second belt 43 have the same conveying direction and together drive the slide bar 45 to slide forward along the two slide rails 11. The connecting bar 451, the two pressing cylinders 46 and all the pressing strips 452 also move forward together with the slide bar 45, so that the paper towel blank 9 moves forward along the longitudinal direction of the workbench frame 1 to the guide plate 611 of a row of knife holders 6. Each cutting blade 7 rotates under the drive of its respective cutting motor 71, cutting the forward-moving tissue blank 9 into multiple tissue blocks; When the pressure strip 452 pushes the cut tissue paper block onto the conveyor belt 22 of the feeding conveyor line 21, the cut tissue paper block can be fed out along the feeding conveyor line 21. Once the multiple paper pressure strips 452 are reset, the next paper towel blank 9 can be pushed to be cut. When it is necessary to adjust the spacing of all the cutting blades 7, the telescopic motor 51 drives the telescopic screw 5 to rotate through the belt drive structure. The two blade holders 6 at the beginning and end automatically adjust the distance between them as the telescopic screw 5 rotates. The telescopic adjustment component 53 stretches or compresses to adjust its length, adjusts the spacing of a row of blade holders 6, and finally achieves the purpose of adjusting the spacing of all the cutting blades 7 so as to cut and form tissues of different sizes. When it is necessary to grind each cutting blade 7, the grinding motor 81 on each tool holder 6 drives the corresponding grinding screw 82 to rotate, thereby causing the grinding holder 8 to slide longitudinally and adjust the grinding distance between the two grinding wheels 83 and the cutting blade 7. On the same tool holder 6, the two grinding motors drive the two grinding wheels 83 to rotate, grinding the cutting edge of the corresponding cutting blade 7 to make it sharper.

[0033] Example 2

[0034] Reference Figures 16 to 19This is the second embodiment of the present invention. The difference between the multi-rotary knife paper cutter with adjustable spacing in this embodiment and the first embodiment is that: in this embodiment, the adjusting seat 3, all the knife holders 6, and all the cutting blades 7 can rise and fall together within the workbench 1, so that all the cutting blades 7 can rise and fall synchronously during rotation, ensuring that the cutting blades 7 can completely cut the corresponding paper towel blanks 9. Specifically, two swing rods 95 are spaced apart inside the workbench 1, each swing rod 95 is arranged along the longitudinal direction of the workbench 1, the adjusting seat 3 is located between the two swing rods 95, and the left and right ends of the adjusting seat 3 are fixedly connected to the middle of the two swing rods 95 respectively. The front end of 5 is hinged to the left and right ends of the workbench 1 via a rotating shaft 951. A lifting motor 91 is fixed inside the workbench 1. A reducer 92 is provided at the output end of the lifting motor 91. A rotating shaft 921 is passed through the reducer 92. The rotating shaft 921 is rotatably mounted inside the workbench 1 along the transverse direction of the workbench 1 (both ends of the rotating shaft 921 are rotatably connected to the workbench 1). A swing arm 93 is fixedly sleeved at the left and right ends of the rotating shaft 921. The ends of the two swing arms 93 away from the rotating shaft 921 are respectively hinged to the rear ends of the two swing rods 95 via a connecting rod 94. Other structures are the same as in the first embodiment and will not be described here.

[0035] Reference Figures 16 to 19 In this embodiment of the multi-rotary knife paper cutter with adjustable spacing, when the paper towel blank 9 is cut on the guide plate 611, during the rotation of each cutting blade 7, the lifting motor 91 drives the rotating shaft 921 to rotate at a certain angle through the reducer 92, which in turn drives the two swing arms 93 to swing. The two swing arms 93 drive the two swing rods 95 to swing around their respective rotating shafts 951 through the connecting rod 94, which in turn drives the adjusting seat 3 to rise and fall. The multiple knife holders 6 and the cutting blades 7 on the adjusting seat 3 also rise and fall accordingly, thereby completely cutting the long strip of paper towel blank 9 into multiple segments. The working principle of other components of the multi-rotary knife paper cutter with adjustable spacing in this embodiment is the same as that in the first embodiment, and will not be described here.

[0036] This utility model relates to a multi-rotary paper cutter with adjustable spacing. It features two conveyor lines spaced apart within a workbench frame 1, with multiple horizontally adjustable blade holders 6 positioned between them. Each blade holder 6 is rotatably connected to a cutting blade 7. It is also equipped with a pushing device 4 and an adjusting device 52. The pushing device 4 pushes the tissue paper blank 9 from one conveyor line onto the blade holder 6 for cutting, then pushes it onto the other conveyor line for unloading. This achieves simultaneous multi-blade cutting of long, strip-shaped tissue paper blanks 9. Furthermore, the spacing of the cutting blades 7 can be flexibly adjusted according to different production needs, significantly improving production efficiency, cutting accuracy, production flexibility, and automation. This provides a more efficient and high-quality paper cutting solution for the tissue paper manufacturing industry, meeting the market's demand for diverse tissue paper products.

[0037] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of protection of the present utility model. Therefore, any equivalent changes made in accordance with the scope of the present utility model patent application shall still fall within the scope of the present utility model.

Claims

1. A multi-rotary knife paper cutter with adjustable spacing, comprising a worktable, characterized in that, The workbench frame is equipped with two conveyor lines spaced apart. An adjustment seat is located below the two conveyor lines. Multiple knife holders are located between the two conveyor lines. All the knife holders are slidably connected to the adjustment seat in a row. A cutting knife is rotatably connected to each knife holder. All the cutting knives are arranged in a row between the two conveyor lines. Above the two conveyor lines is a pushing device for pushing the paper towel blank on one of the conveyor lines onto the knife holder for cutting and then pushing it onto the other conveyor line. The adjustment seat is equipped with an adjustment device for adjusting the spacing between all the cutting knives.

2. The multi-rotary knife paper cutter with adjustable spacing according to claim 1, characterized in that, The adjustment device includes a telescopic lead screw and a telescopic adjustment component. The telescopic lead screw is rotatably disposed in the adjustment seat. The first and last two tool holders are respectively threadedly connected to the telescopic lead screw via connecting blocks. All the tool holders are telescopically connected via the telescopic adjustment component to adjust the spacing between all the tool holders.

3. The multi-rotary knife paper cutter with adjustable spacing according to claim 2, characterized in that, Each of the tool holders is provided with a pair of movable rods, the same pair of movable rods are arranged crosswise and their intersection point is hinged to the tool holder, and the telescopic adjustment member is formed by hinged all the pairs of movable rods end to end in sequence.

4. The multi-rotary knife paper cutter with adjustable spacing according to claim 3, characterized in that, The first and last pairs of movable rods are arranged in a V-shape, while the other pairs of movable rods are arranged in an X-shape.

5. The multi-rotary knife paper cutter with adjustable spacing according to claim 1, characterized in that, The adjustment seat includes a seat body and a cover plate. The top of the seat body is open, and the cover plate is fixed to the top of the seat body and forms a sliding space between the cover plate and the seat body.

6. The multi-rotary knife paper cutter with adjustable spacing according to claim 5, characterized in that, The lower end of the tool holder is sleeved on the cover plate and slidably connected to the sliding rail on the base body, the sliding rail being located within the sliding space.

7. The multi-rotary knife paper cutter with adjustable spacing according to claim 1, characterized in that, The blade holder includes a slide and a pair of blade holders. The slide is slidably disposed on the adjusting seat. The pair of blade holders are fixedly spaced on the slide. The cutting blade is rotatably disposed between the pair of blade holders. The part of each blade holder used to connect the cutting blade is T-shaped and a guide plate is formed on its top. The conveying surfaces of the two conveying lines are connected by the guide plate and are flush.

8. The multi-rotary knife paper cutter with adjustable spacing according to claim 1, characterized in that, Each of the tool holders is longitudinally slidably connected to a grinding wheel, and two corresponding side walls of the grinding wheel are rotatably connected to the grinding wheel for grinding the cutting blade, with the cutting blade located between the two grinding wheels.

9. The multi-rotary knife paper cutter with adjustable spacing according to claim 1, characterized in that, The feeding device includes a slide bar, a connecting bar, and multiple paper pressing strips. The slide bar is slidably disposed longitudinally within the workbench frame, and the connecting bar is slidably disposed vertically on the slide bar. All the paper pressing strips are fixed at intervals on the connecting bar and are offset from all the cutting blades.

10. The multi-rotary knife paper cutter with adjustable spacing according to claim 1, characterized in that, Two swing arms are spaced apart inside the workbench frame. The adjusting seat is located between the two swing arms and is fixedly connected to the middle of the two swing arms. One end of each swing arm is hinged to the workbench frame. A rotating shaft is rotatably connected inside the workbench frame. Swing arms are fixedly sleeved at both ends of the rotating shaft. The ends of the two swing arms away from the rotating shaft are respectively hinged to the other ends of the two swing arms through connecting rods to control the adjusting seat, the blade holder, and the cutting blade to rise and fall together.

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