Double-row longitudinal indentation cutter structure

Abstract

The utility model discloses a double-row longitudinal creasing knife structure which comprises an upper beam structure and a lower beam structure, the upper beam structure is provided with upper creasing wheels distributed front and back, the upper creasing wheels can slide left and right in a reciprocating mode along the upper beam structure, the lower beam structure is provided with lower creasing wheels in one-to-one correspondence with the upper creasing wheels, and the lower creasing wheels can slide left and right in a reciprocating mode along the upper beam structure. Each lower creasing cutter wheel can slide back and forth in the left-right direction along the lower beam structure, the upper creasing wheel and the lower creasing wheel which correspond to each other up and down serve as a creasing wheel set, so that creasing wheel sets which are distributed front and back are formed, and the upper creasing wheel and the lower creasing wheel of each creasing wheel set are relatively meshed to creasing paperboards. And each indentation wheel group can independently or synchronously slide left and right. According to the utility model, the distance between two indentations pressed by the two indentation wheel sets can be adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of carton forming machines, in particular to a double-row longitudinal creasing knife structure. Background Art

[0002] The longitudinal indentation structure is an important component of the carton forming machine, which is used to press the corresponding longitudinal indentation on the cardboard. The indentation structure of the carton forming machine on the market is usually formed by the relative extrusion of the upper and lower indentation wheels. The upper indentation wheel is installed on the upper crossbeam, and the lower indentation wheel is installed on the lower crossbeam. The upper indentation wheel presses down to the lower indentation wheel to form an indentation. Usually, the upper and lower indentation wheels can move laterally along the upper and lower crossbeams, or multiple upper indentation wheels are arranged in parallel on the upper crossbeam, and the lower crossbeam is provided with a lower indentation wheel corresponding to the upper indentation wheel, so that multiple parallel indentations are formed on the cardboard, thereby achieving indentations with different spacings. However, when indentations need to be distributed front and back, usually only upper and lower crossbeams can be set in the front and back directions, and each upper and lower crossbeam corresponds to an upper and lower indentation wheel, that is, two sets of indentation structures are required, that is, the carton forming machine is provided with two indentation structures distributed front and back, which is not only complex in structure, increasing the complexity of the carton forming machine, but also low in indentation efficiency. Utility Model Content

[0003] The utility model aims to solve the deficiencies of the above-mentioned technology and is designed to provide a double-row longitudinal indentation knife structure.

[0004] The utility model provides a double-row longitudinal creasing knife structure, comprising an upper beam structure and a lower beam structure, wherein the upper beam structure is provided with upper creasing wheels distributed front to back, and the upper creasing wheels can slide back and forth left to right along the upper beam structure, and the lower beam structure is provided with lower creasing wheels corresponding to the upper creasing wheels one by one, and each lower creasing knife wheel can slide back and forth left to right along the lower beam structure, and the upper and lower corresponding creasing wheels serve as a creasing wheel group, thereby forming a creasing wheel group distributed front to back, and the upper creasing wheel and the lower creasing wheel of each creasing wheel group are relatively meshed to creasing the cardboard, and each creasing wheel group can slide left to right individually or synchronously.

[0005] Preferably, the upper indentation wheel includes a first base, a second base and an upper cutter wheel, the first base is slidably connected to the upper beam structure through a first transmission structure, the second base is slidably connected to the first base, the second base slides back and forth relative to the first base, and the upper cutter wheel is rotatably connected to the second base; the lower indentation wheel includes a first base, a second base, a lower cutter wheel, a rotating shaft and a driving device, the first base is slidably connected to the lower beam structure through a second transmission structure, the second base is connected above the first base, the lower cutter wheel is rotatably connected to the second base, an axial mounting hole is opened in the center of the lower cutter wheel, the rotating shaft is inserted into the mounting hole, the driving device is connected to the rotating shaft and drives the rotating shaft to rotate, and the rotating shaft drives the lower cutter wheel to rotate.

[0006] Further optimization, the first transmission structure includes a first conveyor belt for left and right transmission arranged on the upper beam structure, the first conveyor belt is provided with a first fixed seat that is transmitted along with the first conveyor belt, the front and rear positions of the first fixed seat are respectively provided with a first traction drive structure, the first base is correspondingly provided with a first positioning structure that forms traction with the first traction drive structure, thereby driving the upper indentation wheels distributed front and back to transmit along the first conveyor belt, and the first fixed seat is provided with a first sensor for sensing the position of the first positioning structure.

[0007] Further optimized, the first transmission structure includes a first rack structure fixed to the upper beam structure in the left and right directions, a first gear structure meshing with the first rack structure is provided on the first base, and a first driving member that drives the first gear structure to rotate is also provided on the first base.

[0008] Further optimized, the first transmission structure includes a screw pair, the screw in the screw pair is fixed to the upper beam structure in the left and right directions, the nut in the screw pair is connected to the first base, and the upper beam structure is also provided with a third driving component for driving the screw to rotate.

[0009] Further optimization, the upper beam structure is also provided with a first guide structure, the first guide structure includes two groups of first guide rails connected to the upper beam structure and extending left and right, each group of first guide rails is slidably fitted with a first slider, the first base or the second base is connected to one group of first sliders, and the first fixed seat is connected to the other group of first sliders; the lower beam structure is also provided with a second guide structure, the second guide structure includes two groups of second guide rails connected to the lower beam structure and extending left and right, each group of second guide rails is slidably fitted with a second slider, the first base or the second base is connected to one group of second sliders, and the second fixed seat is connected to the other group of second sliders.

[0010] Further optimization, the second transmission structure includes a second conveyor belt for left and right transmission arranged on the lower beam structure, the second conveyor belt is provided with a second fixed seat that is transmitted along with the second conveyor belt, the front and rear positions of the second fixed seat are respectively provided with second traction drive structures, the first base is correspondingly provided with a second positioning structure that forms traction with the second traction drive structure, thereby driving the front and rear distributed lower indentation wheels to transmit along the second conveyor belt and the rotating shaft, and the second fixed seat is provided with a second sensor for sensing the position of the second positioning structure.

[0011] Further optimized, the second transmission structure includes a second rack structure fixed to the lower beam structure in the left and right directions, a second gear structure meshing with the second rack structure is provided on the first base, and a second driving member for driving the second gear structure to rotate is also provided on the first base.

[0012] Further optimized, the second transmission structure includes a screw pair, the screw in the screw pair is fixed to the lower beam structure in the left and right directions, the nut in the screw pair is connected to the first base, and the lower beam structure is also provided with a third driving member for driving the screw to rotate.

[0013] Further optimization is carried out, wherein the upper cutter wheel includes a first cutter disc and a first blade located at the side edge of the first cutter disc; the lower cutter wheel includes a second cutter disc and a second blade located at the side edge of the second cutter disc, and the first blade and the second blade are relatively engaged to indent the cardboard; in the same indentation wheel group, the number of the first blade is one, and the number of the second blade is one or more.

[0014] Further optimized, the upper beam structure is distributed along the left and right directions with a plurality of upper indentation wheels, each upper indentation wheel is slidably connected to the same set of first guide rails through a corresponding first slider, and the first base of each upper indentation wheel is provided with a first positioning structure;

[0015] The lower beam structure is provided with corresponding lower indentation wheels, each lower indentation wheel is slidably connected to the same set of second guide rails through a corresponding second slider, and the first base of each lower indentation wheel is provided with a second positioning structure.

[0016] Preferably, the upper beam structure can move reciprocatingly up and down relative to the lower beam structure.

[0017] The technical effect of the utility model is that two upper indentation wheels are distributed in the front and rear of the upper beam structure, and corresponding lower indentation wheels are distributed in the front and rear of the lower beam structure. The upper and lower indentation wheels form an indentation wheel group, forming two indentation wheel groups distributed in the front and rear, each indentation wheel group indents an indentation, and each indentation wheel group can move back and forth left and right along the upper and lower beam structures. Therefore, the front and rear indentation wheel groups can be staggered front and back, that is, they are not on the same straight line, so that the distance between the two indentations indented by the two indentation wheel groups can be adjusted. Compared with the two parallel indentations indented by the two conventional indentation groups distributed in parallel left and right, due to the axial length of the indentation group itself, the lower limit value of the distance between the two indentation groups cannot reach the minimum. In the utility model, the two indentation wheel groups are distributed front and back. When the position is adjusted left and right, the axial length of the indentation wheel group itself can be overcome, and the distance between the two indentations can be less than the axial length value of the indentation wheel group to meet higher requirements; at the same time, the front and rear indentation wheel groups can adopt different knife wheels, so that indentation segments of different shapes or sizes are formed in the front and back of the same cardboard, and the structure is simple, easy to implement and flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the overall structure diagram;

[0019] Figure 2 It is a structural diagram from another perspective of the whole;

[0020] Figure 3It is a structural diagram of a separate indentation wheel set;

[0021] Figure 4 It is the structural diagram of the upper beam structure and the upper indentation wheel;

[0022] Figure 5 It is a structural diagram of the lower beam structure and the lower indentation wheel;

[0023] Figure 6 This is a structural diagram when the first and second transmission structures are gear rack structures;

[0024] Figure 7 This is a structural diagram when the first and second transmission structures are screw pair structures.

[0025] In the figure: 1. Upper beam structure; 11. Third slider; 12. Third guide rail; 13. Drive structure; 2. Lower beam structure; 3. Upper indentation wheel; 31. First base; 32. Second base; 33. Upper cutter wheel; 331. First cutter disc; 332. First blade; 4. First transmission structure; 41. First conveyor belt; 42. First fixed seat; 43. First traction drive structure; 44. First positioning structure; 45. First sensor; 46. First rack structure; 47. First gear structure; 48. First drive member; 49. Lead screw; 410. Nut; 411. Third drive member;

[0026] 5. First guide structure; 51. First guide rail; 52. First slider; 6. Lower indentation wheel; 61. First base; 62. Second base; 63. Lower cutter wheel; 631. Second cutter disc; 632. Second cutting edge; 64. Rotating shaft; 65. Drive device; 7. Second transmission structure; 71. Second conveyor belt; 72. Second fixed base; 73. Second traction drive structure; 74. Second positioning structure; 75. Second sensor;

[0027] 8. Second guide structure; 81. Second guide rail; 82. Second slider. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0029] The utility model comprises an upper beam structure 1 and a lower beam structure 2, the upper beam structure 1 and the lower beam structure 2 are distributed up and down and parallel to each other, the upper beam structure 1 and the lower beam structure 2 are both extended and distributed in the left and right directions, that is, their length directions are left and right directions, the upper beam structure 1 is provided with an upper indentation wheel 3 distributed front and back, in this embodiment, the number of upper indentation wheels is two, distributed front and back, each upper indentation wheel 3 can slide back and forth left and right along the upper beam structure 1, the lower beam structure 2 is provided with a lower indentation wheel 6 corresponding one to the lower indentation wheel 6, each lower indentation knife wheel can slide back and forth left and right along the lower beam structure 2, the upper indentation wheel 3 and the lower indentation wheel 6 corresponding to the upper and lower parts serve as an indentation wheel group, thereby forming an indentation wheel group distributed front and back, the upper indentation wheel 3 and the lower indentation wheel 6 of each indentation wheel group are relatively meshed to indent the cardboard, in this embodiment, the upper indentation wheel 3 forms an indentation on the cardboard located in the middle by pressing down on the lower indentation wheel 6, and the front and rear indentation wheel groups slide left and right to adjust the spacing between the corresponding indentations.

[0030] The upper beam structure 1 and the lower beam structure 2 in this embodiment can be a single beam or can be composed of multiple beams.

[0031] The upper beam structure 1 and the lower beam structure 2 can move up and down relative to each other. In this embodiment, third sliders 11 are provided at both ends of the upper beam structure 1, and a third guide rail 12 is provided on the carton forming machine. The third slider 11 slides on the third guide rail 12. One end of the upper beam structure 1 is provided with a driving mechanism 13 for driving the upper beam structure 1 to move up and down. The driving mechanism 13 adopts the form of a motor combined with a screw pair, so that the upper beam structure 1 can move back and forth up and down relative to the lower beam structure 2. Of course, other forms such as gear racks and worm gears can also be used for driving.

[0032] The specific structure is as follows: the upper indentation wheel 3 includes a first base 31, a second base 32 and an upper cutter wheel 33. The first base 31 is slidably connected to the upper beam structure 1 through a first transmission structure 4, and the second base 32 is slidably connected to the first base 31. In this embodiment, the first base 31 is an L-shaped plate, and a first transmission structure 4 is provided between its vertical part and the upper beam structure 1.

[0033] The first transmission structure 4 includes a first conveyor belt 41, which is extended to the upper beam structure 1 in the longitudinal direction, that is, left and right directions. A first fixed seat 42 is provided on the first conveyor belt 41, and the first fixed seat 42 is fixed to the first conveyor belt 41. A first traction drive structure 43 is provided at the front and rear of the first fixed seat 42. Each first traction drive structure 43 includes a telescopic motor, and the telescopic end of the telescopic motor can be telescoped downward. A first positioning structure 44 is provided on the top of the vertical part of the first base 31. In this embodiment, the first positioning structure 44 is a positioning plate, and a positioning hole is provided on the upper surface of the positioning plate. When the telescopic end of the telescopic motor is inserted into the positioning hole to form a fit, the telescopic motor and the first fixed seat 42 are driven by the first conveyor belt 41 to move, thereby driving the entire upper indentation wheel 3 to move. There are two first traction drive structures 43, which can simultaneously pull the front and rear upper indentation wheels 3, or can pull one upper indentation wheel 3 alone, which is very flexible. The first traction drive structure 43 also includes a position sensor, located near the telescopic motor. A corresponding induction source is provided on the first positioning structure 44. The position sensor detects the induction source, aligning the first fixing seat 42 and the first positioning structure 44. This allows the telescopic end of the telescopic motor to precisely align with the positioning hole to achieve traction. The upper cutter wheel 33 is rotatably connected to the bottom of the second base 32.

[0034] In another embodiment, the first transmission structure 4 includes a first rack structure 46 fixed to the upper beam structure 1 in the left and right directions, and a first gear structure 47 meshing with the first rack structure 46 is provided on the first base 31. The first base 31 is also provided with a first driving member 48 that drives the first gear structure 47 to rotate, so that the first base 31 moves left and right through the cooperation between the first gear structure 47 and the first rack structure 46.

[0035] In another embodiment, the first transmission structure 4 includes a screw pair, the screw 49 in the screw pair is fixed to the upper beam structure 1 in the left and right directions, the nut 410 in the screw pair is connected to the first base 31, and the upper beam structure 1 is also provided with a third driving member 411 for driving the screw 49 to rotate. The third driving member 411 is usually a motor to drive the screw 49 to rotate. The rotation of the screw 49 drives the nut 410 to slide left and right along the upper beam structure 1, and the first base 31 moves with the nut 410, thereby realizing the reciprocating sliding of the upper indentation wheel 3 along the upper beam structure 1.

[0036] In this embodiment, the second base 32 is slidably connected to the first base 31, and the second base 32 slides back and forth up and down relative to the first base 31. Specifically, a slide rail and a slider are provided between the second base 32 and the first base 31 as a guide. A driving member is provided on the first base 31, and the driving end of the driving member is connected to the second base 32, so that the second base 32 moves up and down along the first base 31 under the drive of the driving member, and the upper cutter wheel 33 moves up and down with the second base 32.

[0037] The upper beam structure 1 is also provided with a first guide structure 5, which includes two groups of first guide rails 51 connected to the upper beam structure 1 and extending left and right. A first slider 52 is slidably fitted on each group of first guide rails 51. In this embodiment, there are two first sliders 52, and the first base 31 and the second base 32 are respectively connected to one first slider 52. The two first sliders 52 respectively correspond to and slidably fit the two first guide rails 51, and a first slider 52 is also provided at the bottom of the first fixed seat 42, which corresponds to and slidably fits on the other first guide rail 51. That is, in this embodiment, there are five first guide rails 51, and two first sliders 52 are provided on the upper indentation wheel 3, which correspond to and slidably fit the two first guide rails 51. The two upper indentation wheels 3 correspond to four first guide rails 51, and a first slider 52 is provided on the first fixed seat 42, which corresponds to and slidably fits on the other first slide rail. It should be noted that the number of the first guide rails 51 and the first slider 52 for guiding the upper indentation wheel 3 and the first fixed seat 42 is not limited to one, and can be multiple.

[0038] The lower indentation wheel 6 includes a first base 61, a second base 62, a lower cutter wheel 63, a rotating shaft 64 and a driving device 65. The first base 61 is slidably connected to the lower beam structure 2 through a second transmission structure 7. The second base 62 is connected to the top of the first base 61. In this embodiment, the first base 61 is an inverted L-shaped plate, and a second transmission structure 7 is provided between its vertical part and the lower beam structure 2.

[0039] The second transmission structure 7 includes a second conveyor belt 71, which extends along the length direction of the lower beam structure 2, that is, left and right directions, and is arranged on the lower beam structure 2. A second fixed seat 72 is provided on the second conveyor belt 71, and a second traction drive structure 73 is provided at the front and rear of the second fixed seat 72. The structure and working principle of the second traction drive structure 73 are the same as the first traction drive structure 43. The difference is that the telescopic end of the telescopic motor of the second traction drive structure 73 can be telescoped upward, and a second positioning structure 74 is provided at the bottom of the vertical part of the first base 61. In this embodiment, the second positioning structure 74 is also a positioning plate, and a positioning hole is provided on the lower surface of the positioning plate. When the telescopic end of the telescopic motor is extended into the positioning hole to form a fit, the telescopic motor and the second fixed seat 72 are driven by the second conveyor belt 71 to move, thereby driving the entire lower indentation wheel 6 to move. There are two second traction drive structures 73, which can simultaneously pull the front and rear lower indentation wheels 6, or can pull one lower indentation wheel 6 alone, which is very flexible. The second traction drive structure 73 also includes a position sensor, located near the telescopic motor. A corresponding induction source is provided on the second positioning structure 74. The position sensor detects the induction source, aligning the second fixing base 72 and the second positioning structure 74. This allows the telescopic end of the telescopic motor to precisely align with the positioning hole to achieve traction. The lower cutter wheel 63 is rotatably connected to the top of the second base 62.

[0040] In another embodiment, the second transmission structure 7 includes a second rack structure 76 fixed to the lower beam structure 2 in the left and right directions, and a second gear structure 77 meshing with the second rack structure 76 is provided on the first base 61. The first base 61 is also provided with a second driving member 78 that drives the second gear structure 77 to rotate, so that the first base 61 moves left and right through the cooperation between the second gear structure 77 and the second rack structure 76.

[0041] In another embodiment, the second transmission structure 7 includes a screw pair, the screw 49 in the screw pair is fixed to the lower beam structure 2 in the left and right directions, the nut 410 in the screw pair is connected to the first base 61, and the lower beam structure 2 is also provided with a third driving member 411 for driving the screw 49 to rotate. The third driving member 411 is usually a motor to drive the screw 49 to rotate. The rotation of the screw 49 drives the nut 410 to slide left and right along the lower beam structure 2, and the first base 61 moves with the nut 410, thereby realizing the reciprocating sliding of the lower indentation wheel 6 along the lower beam structure 2.

[0042] In summary, the first transmission structure 4 can adopt a belt drive, a rack and pinion drive, or a screw drive, and the second transmission structure 7 can also adopt a belt drive, a rack and pinion drive, or a screw drive. Therefore, the first transmission structure 4 and the second transmission structure 7 can adopt the same transmission structure, or different transmission structures. For example, the first transmission structure 4 adopts a belt drive, and the second transmission structure 7 can adopt a belt drive, or a rack and pinion drive, or a screw drive. In short, the transmission structures adopted by the first transmission structure 4 and the second transmission structure 7 can be flexibly combined according to actual needs. Of course, in addition to the above-mentioned belt drive and rack and pinion drive, gear chain drive, worm gear drive, etc. can also be used.

[0043] In this embodiment, there are two rotating shafts 64, which are distributed front and back and arranged parallel to each other. The front and rear lower cutter wheels 63 are respectively sleeved on the corresponding rotating shafts 64. An axial polygonal mounting hole is opened in the center of the lower cutter wheel 63. The rotating shaft 64 is correspondingly a polygonal shaft body. The rotating shaft 64 is inserted into the mounting hole to form a sleeve, so that the lower cutter wheel 63 can rotate with the rotating shaft 64 and can move back and forth along the length direction of the rotating shaft 64. The driving device 65 is connected to the rotating shaft 64 and drives the rotating shaft 64 to rotate. The rotating shaft 64 drives the lower cutter wheel 63 to rotate. One end of the two rotating shafts 64 is connected to the driving device 65 through a gear transmission to realize the synchronous rotation of the two rotating shafts 64. Of course, the two rotating shafts 64 can also be controlled to rotate separately, which is not repeated here.

[0044] The lower beam structure 2 is also provided with a second guide structure 8, which includes two groups of second guide rails 81 connected to the lower beam structure 2 and extending left and right. Each group of second guide rails 81 is slidably fitted with a second slider 82. The first base 61 or the second base 62 is connected to one group of second sliders 82, and the second fixed seat 72 is connected to the other group of second sliders 82. In this embodiment, the first base 61 is connected to a second slider 82, and the second base 62 is connected to a second slider 82. That is, in this embodiment, the number of second slide rails is also five, each lower indentation wheel 6 corresponds to two second slide rails, and the second fixed seat 72 corresponds to one second slide rail.

[0045] The upper cutter wheel 33 includes a first cutter disc 331 and a first blade 332 located at the side edge of the first cutter disc 331; the lower cutter wheel 63 includes a second cutter disc 631 and a second blade 632 located at the side edge of the second cutter disc 631. The first blade 332 and the second blade 632 engage with each other to indent the cardboard.

[0046] In the same indentation wheel group, the number of the first blade 332 is one, and the number of the second blade 632 can be one or more. When the number of the second blade 632 is multiple, the multiple second blades 632 are axially arranged in parallel along the second cutter disc 631, that is, the upper cutter wheel 33 moves downward, and the first blade 332 is pressed down onto the second blade 632 of the lower cutter wheel 63 to form an indentation. The number of the second blades 632 is multiple and axially arranged in parallel, and the multiple second blades 632 have blades of different shapes, so that the upper cutter wheel 33 moves axially relative to the lower cutter wheel 63, so that the first blade 332 can be pressed down onto different second blades 632, thereby forming indentations of different shapes. In this embodiment, Figure 3 As shown, the first blade 332 adopts an outward convex blade; the number of the second blade 632 is two, one is an outward convex blade, and the other is an inward concave blade formed by two outward convex blades spaced apart, which cooperates with the outward convex first blade 332 to press out concave and convex indentations respectively. Of course, the upper blade wheel 33 and the lower blade wheel 63 can be set with blades according to actual needs, and the specific relationship between the blade shape and the indentation shape will not be repeated here.

[0047] The upper beam structure 1 is provided with a plurality of upper creasing wheels 3 distributed along the left and right directions, and each upper creasing wheel 3 is slidably connected to the same group of first guide rails 51 through a corresponding first slider 52, and the first base 31 of each upper creasing wheel 3 is provided with a first positioning structure 44; the lower beam structure 2 is provided with a corresponding lower creasing wheel 6, and each lower creasing wheel 6 is slidably connected to the same group of second guide rails 81 through a corresponding second slider 82, and the first base 61 of each lower creasing wheel 6 is provided with a second positioning structure 74, so that a plurality of creasing wheel groups are distributed in parallel in the left and right directions to meet the needs of batch creasing of cardboards.

[0048] The driving device 65 for driving the conveyor belts and the rotating shaft 64 may be a motor, a hydraulic cylinder or a pneumatic cylinder.

[0049] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone can derive other forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, any technical solution that is the same or similar to that of the present application falls within the scope of protection of the present invention.

Claims

1. Double-row longitudinal indentation knife structure, characterized by: The invention comprises an upper beam structure (1) and a lower beam structure (2), wherein the upper beam structure (1) is provided with upper indentation wheels (3) distributed front and back, and the upper indentation wheels (3) can slide back and forth along the upper beam structure (1). The lower beam structure (2) is provided with a lower indentation wheel (6) corresponding to the upper indentation wheel (3) on a one-to-one basis, and the lower indentation wheel can slide back and forth along the lower beam structure (2). The upper and lower corresponding indentation wheels (3) and lower indentation wheels (6) serve as an indentation wheel set, thereby forming an indentation wheel set distributed front and back. The upper creasing wheel (3) and the lower creasing wheel (6) of each creasing wheel group are engaged with each other to creasing the paperboard. Each creasing wheel set can slide left and right independently or synchronously.

2. The double-row longitudinal indentation knife structure according to claim 1, characterized in that: The upper indentation wheel (3) comprises a first base (31), a second base (32) and an upper cutter wheel (33); the first base (31) is slidably connected to the upper beam structure (1) via a first transmission structure (4); the second base (32) is slidably connected to the first base (31); the second base (32) slides up and down reciprocatingly relative to the first base (31); and the upper cutter wheel (33) is rotatably connected to the second base (32); The lower indentation wheel (6) comprises a first base (61), a second base (62), a lower cutter wheel (63), a rotating shaft (64) and a driving device (65); the first base (61) is slidably connected to the lower beam structure (2) through a second transmission structure (7); the second base (62) is connected above the first base (61); the lower cutter wheel (63) is rotatably connected to the second base (62); an axial mounting hole is provided in the center of the lower cutter wheel (63); the rotating shaft (64) is inserted into the mounting hole; the driving device (65) is connected to the rotating shaft (64) and drives the rotating shaft (64) to rotate; and the rotating shaft (64) drives the lower cutter wheel (63) to rotate.

3. The double-row longitudinal indentation knife structure according to claim 2, characterized in that: The first transmission structure (4) comprises a first conveyor belt (41) for left-right transmission arranged on the upper beam structure (1); a first fixed seat (42) is provided on the first conveyor belt (41) and is driven along with the first conveyor belt (41); first traction drive structures (43) are respectively provided at the front and rear positions of the first fixed seat (42); a first positioning structure (44) is correspondingly provided on the first base (31) and forms traction with the first traction drive structure (43), thereby driving the upper indentation wheels (3) distributed front and rear to transmit along the first conveyor belt (41); and a first sensor (45) for sensing the position of the first positioning structure (44) is provided on the first fixed seat (42).

4. The double-row longitudinal indentation knife structure according to claim 2, characterized in that: The first transmission structure (4) comprises a first rack structure (46) fixed to the upper beam structure (1) in the left and right directions, a first gear structure (47) meshing with the first rack structure (46) is provided on the first base (31), and a first driving member (48) for driving the first gear structure (47) to rotate is also provided on the first base (31).

5. The double-row longitudinal indentation knife structure according to claim 2, characterized in that: The first transmission structure (4) includes a screw pair, a screw (49) in the screw pair is fixed to the upper beam structure (1) in a left-right direction, a nut (410) in the screw pair is connected to the first base (31), and the upper beam structure (1) is further provided with a third driving member (411) for driving the screw (49) to rotate.

6. The double-row longitudinal indentation blade structure according to claim 3, characterized in that: The second transmission structure (7) includes a second conveyor belt (71) for left-right transmission arranged on the lower beam structure (2); a second fixed seat (72) is provided on the second conveyor belt (71) and is driven by the second conveyor belt (71); a second traction drive structure (73) is provided at the front and rear positions of the second fixed seat (72); a second positioning structure (74) is provided on the first base (61) for forming traction with the second traction drive structure (73), thereby driving the lower indentation wheels (6) distributed front and rear to transmit along the second conveyor belt (71) and the rotating shaft (64); and a second sensor (75) is provided on the second fixed seat (72) for sensing the position of the second positioning structure (74).

7. The double-row longitudinal indentation blade structure according to claim 6, characterized in that: The upper beam structure (1) is further provided with a first guide structure (5), the first guide structure (5) comprising two groups of first guide rails (51) connected to the upper beam structure (1) and extending in left and right directions, each group of first guide rails (51) being slidably fitted with a first slider (52), the first base (31) or the second base (32) being connected to one group of the first sliders (52), and the first fixing seat (42) being connected to the other group of the first sliders (52); The lower beam structure (2) is further provided with a second guide structure (8), the second guide structure (8) comprising two groups of second guide rails (81) connected to the lower beam structure (2) and extending in left and right directions, each group of second guide rails (81) being slidably fitted with a second slider (82), the first base (61) or the second base (62) being connected to one group of the second sliders (82), and the second fixed base (72) being connected to the other group of the second sliders (82).

8. The double-row longitudinal indentation blade structure according to claim 2, characterized in that: The second transmission structure (7) comprises a second rack structure fixed to the lower beam structure (2) in the left and right directions, a second gear structure meshing with the second rack structure is provided on the first base (61), and a second driving member driving the second gear structure to rotate is also provided on the first base (61).

9. The double-row longitudinal indentation blade structure according to claim 2, characterized in that: The second transmission structure (7) includes a screw pair, wherein a screw (49) in the screw pair is fixed to the lower beam structure (2) in a left-right direction, a nut (410) in the screw pair is connected to the first base (61), and the lower beam structure (2) is further provided with a third driving member (411) for driving the screw to rotate.

10. The double-row longitudinal creasing blade structure according to claim 2, characterized in that: The upper cutter wheel (33) comprises a first cutter disc (331) and a first blade (332) located at the side edge of the first cutter disc (331); the lower cutter wheel (63) comprises a second cutter disc (631) and a second blade (632) located at the side edge of the second cutter disc (631); the first blade (332) and the second blade (632) are relatively engaged to indent the cardboard; in the same indentation wheel set, the number of the first blade (332) is one, and the number of the second blade (632) is one or more.

11. The double-row longitudinal creasing blade structure according to claim 10, characterized in that: The upper beam structure (1) is provided with a plurality of upper indentation wheels (3) distributed along the left and right directions, each upper indentation wheel (3) is slidably connected to the same set of first guide rails (51) via a corresponding first slider (52), and the first base (31) of each upper indentation wheel (3) is provided with a first positioning structure (44); The lower beam structure (2) is provided with corresponding lower indentation wheels (6), each lower indentation wheel (6) is slidably connected to the same set of second guide rails (81) via a corresponding second slider (82), and the first base (61) of each lower indentation wheel (6) is provided with a second positioning structure (74).

12. The double-row longitudinal indentation blade structure according to claim 1, characterized in that: The upper beam structure (1) can move up and down reciprocatingly relative to the lower beam structure (2).

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