A longitudinal slitting and creasing device for a corrugated cardboard production line

Abstract

The invention relates to the technical field of corrugated cardboard production, and discloses a longitudinal slitting and creasing device for a corrugated cardboard production line. When a driving motor drives a rotating shaft to rotate, a driving pulley, a transmission belt, and a driven pulley can be used to drive a slitting knife to rotate and realize longitudinal slitting, thereby realizing the function of the same driving motor driving multiple slitting knives to operate; and when some slitting knives are not needed, a driving cylinder is used to drive a base plate to slide in an arc, so that the slitting knife rotates upward, and the slitting knife is prevented from cutting the corrugated cardboard during its rotation, which is convenient to use; at the same time, no matter what position the slitting knife is in, an elastic metal paper pressing sheet can be pressed tightly on the upper surface of the corrugated cardboard to improve the flatness of the corrugated cardboard on the workbench, thereby improving the cutting flatness of longitudinal slitting.

Description

Technical Field

[0001] The invention relates to the technical field of corrugated board production, in particular to a longitudinal slitting and creasing device for a corrugated board production line. Background Art

[0002] Corrugated cardboard is a multi-layer adhesive body, consisting of at least one corrugated core paper sandwich (also called corrugated paper) and a layer of cardboard board. It has high mechanical strength, good elasticity and extensibility, and is mainly used to make packaging materials such as cartons. Corrugated cardboard production line is a device used to produce corrugated cardboard.

[0003] Among them, the longitudinal slitting and creasing equipment of the corrugated cardboard production line is used for longitudinal slitting and creasing of corrugated cardboard. For example, CN210850516U, a Chinese patent with an authorization announcement date of June 26, 2020, discloses "A Corrugated Cardboard Slitting and Pressing Device". The patent actually discloses the main components of the longitudinal slitting function of the longitudinal slitting and creasing equipment. The longitudinal slitting function is composed of multiple slitting and pressing devices. The spacing between adjacent slitting and pressing devices is adjusted to achieve the control of the longitudinal slitting spacing. At the same time, an appropriate number of slitting and pressing devices are selected for use according to actual needs, and the slitting knives of the remaining slitting and pressing devices that do not need to be used need to be lifted.

[0004] However, when realizing the lifting function of the slitting knife, the conventional setting is to lift the entire slitting and paper pressing device upward to separate the slitting knife from the corrugated cardboard. However, after the entire slitting and paper pressing device is lifted upward, the paper pressing cardboard will also separate from the corrugated cardboard, thereby losing the paper pressing function. In addition, a motor is designed in each slitting and paper pressing device to drive the slitting knife to rotate, resulting in the problem of increased costs. Summary of the invention

[0005] The purpose of the present invention is to provide a longitudinal slitting and creasing device for a corrugated board production line, which is convenient to use and can simultaneously drive the slitting blade of the required slitting and paper pressing device to rotate.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: a longitudinal slitting and creasing device for a corrugated cardboard production line, comprising a frame, a workbench arranged on the frame and for corrugated cardboard to be transmitted, a plurality of longitudinal slitting and pressing devices arranged on the frame, and a creasing device, wherein a concave groove extending along the arrangement direction of the plurality of longitudinal slitting and pressing devices is formed below the workbench corresponding to the longitudinal slitting and pressing devices, the frame is provided with two sliding shafts, a rotating shaft in the shape of a regular polygon is rotatably connected to the frame, and a driving motor for driving the rotating shaft to rotate is provided on the frame The longitudinal slitting and pressing device includes a base plate which is slidably connected to two sliding shafts and can be locked in position, a driving pulley which is slidably arranged on a rotating shaft and is rotatably connected to the base plate, an adjusting plate which is slidably arranged on the base plate around the rotating axis of the driving pulley, a driven pulley which is rotatably connected to the adjusting plate, a transmission belt which is arranged between the driving pulley and the driven pulley, a slitting knife which is linked to the driven pulley, a driving cylinder whose two ends are hinged between the base plate and the adjusting plate to drive the base plate to slide in an arc shape, and an elastic metal paper pressing sheet which is arranged on the base plate and is used to press the corrugated cardboard part on both sides of the slitting knife.

[0007] By adopting the above scheme, when the driving motor drives the rotating shaft to rotate, the slitting knife can be driven to rotate through the active pulley, the transmission belt, and the driven pulley to achieve longitudinal slitting, thereby achieving the effect of the same driving motor driving multiple slitting knives to operate; and when some slitting knives are not needed, the driving cylinder drives the base plate to slide in an arc so that the slitting knife rotates upward to avoid cutting the corrugated cardboard during the rotation of the slitting knife, which is convenient to use; at the same time, no matter what position the slitting knife is in, the elastic metal paper pressing sheet can be pressed against the upper surface of the corrugated cardboard to improve the flatness of the corrugated cardboard on the workbench, thereby improving the cutting flatness of the longitudinal slitting.

[0008] The present invention is further configured as follows: the base plate is provided with a first arc groove, a second arc groove, and a third arc groove located between the first arc groove and the second arc groove; the adjustment plate is provided with a first arc block slidably arranged in the first arc groove, and a second arc block slidably arranged in the second arc groove; the driven pulley is provided with a connecting tube slidably arranged in the third arc groove and having an inner hexagonal hole, the first arc block and the second arc block are telescopically provided with mounting seats that are movable along the axial direction of the connecting tube, elastic components that drive the mounting seat to move toward a direction close to the connecting tube are provided at both ends of the mounting seat and between the first arc block and the second arc block, and the mounting seat is provided with a plurality of elastic components that drive the mounting seat to move in a direction close to the connecting tube. A rotating seat is rotatably connected to the rotating seat with a hexagonal column matching the hexagonal hole, the slitting knife is arranged on the rotating seat, and the hexagonal column is embedded in the hexagonal hole under the elastic force of the elastic component to realize the linkage between the driven pulley and the rotating seat; a linkage component is arranged between the base plate and the mounting seat, and in the process of the adjustment plate moving upward along the first arc groove and the second arc groove, when the adjustment plate moves to the middle of the stroke, the hexagonal column and the hexagonal hole are driven to gradually move to a disengaged state under the action of the linkage component; in the process of the adjustment plate moving downward along the first arc groove and the second arc groove, when the adjustment plate moves to the middle of the stroke, the hexagonal column is driven to gradually embed into the hexagonal hole under the action of the linkage component.

[0009] By adopting the above scheme, in the process of driving the base plate to slide in an arc by driving the air cylinder so that the scoring cutter rotates upward and then separates from the corrugated cardboard, when the adjustment plate moves to the middle of the stroke, the linkage component begins to drive the hexagonal column and the hexagonal hole to gradually move to a disengaged state, thereby disconnecting the scoring cutter and the driven pulley to prevent the rotation of the cutter; in the process of the adjustment plate moving downward along the first arc groove and the second arc groove to reset, when the adjustment plate moves to the middle of the stroke, the linkage component begins to drive the hexagonal column to gradually embed into the hexagonal hole, thereby realizing the linkage between the driven pulley and the cutter; in addition, during the process of the cutter rotating upward, the height position of the cutter can be adjusted within a certain range.

[0010] The present invention is further configured as follows: the linkage component includes a first wedge block arranged on the base plate and located between the first arc groove and the third arc groove, a second wedge block arranged on the base plate and located between the second arc groove and the third arc groove, an arc-shaped rack arranged below the middle of the third arc groove, and a gear ring arranged on the circumference of the connecting pipe and meshing with the arc-shaped rack; when the adjusting plate moves upward to the middle of the stroke, the lower ends of the first wedge block and the second wedge block are embedded in the gap between the base plate and the mounting seat, and gradually drive the mounting seat to overcome the elastic force of the elastic component so that the hexagonal hole and the hexagonal column are separated; when the adjusting plate moves downward to the middle of the stroke, the gear ring and the arc-shaped rack are meshed to drive the connecting pipe to rotate, and the hexagonal column is embedded in the hexagonal hole when it is just in a state corresponding to the hexagonal hole under the elastic force of the elastic component.

[0011] By adopting the above scheme, when the adjustment plate moves upward to the middle of the stroke, the lower ends of the first wedge block and the second wedge block are embedded in the gap between the base plate and the mounting seat, and gradually drive the mounting seat to overcome the elastic force of the elastic component so that the hexagonal hole and the hexagonal column are separated; when the adjustment plate moves downward to the middle of the stroke, the gear ring and the arc-shaped rack engage with each other to drive the connecting tube to rotate, and the hexagonal column is embedded in the hexagonal hole when it is just in the state corresponding to the hexagonal hole under the elastic force of the elastic component; finally, the functions of disconnecting the linkage and resetting the linkage are realized.

[0012] The present invention is further configured as follows: a limit bracket is provided on the substrate to achieve abutment against the end surface of the mounting seat away from the substrate, and when the adjustment plate moves upward from the lower end to a state where the gear ring and the arc-shaped rack are meshed, the limit bracket maintains a state of abutment against the end surface of the mounting seat away from the substrate.

[0013] By adopting the above scheme, during the cutting process of the slitting knife, in order to reduce or avoid the shaking of the mounting seat under the compression of the elastic component, the setting of the limit bracket can limit the axial movement of the mounting seat along the connecting tube, thereby maintaining the stability of the slitting knife when rotating.

[0014] The present invention is further configured as follows: a first partition protruding from the first arc groove is provided on the first arc block, a second partition protruding from the second arc groove is provided on the second arc block, guide shafts passing through both ends of the mounting seat are provided on the first partition and the second partition, the elastic component includes a first compression spring sequentially sleeved on the guide shaft and a locking nut threadedly connected to the end of the guide shaft, and the distance between the end surface of the first partition and the second partition close to the mounting seat and the end surface of the substrate is greater than the thickness of the lower end of the first wedge block and greater than the thickness of the lower end of the second wedge block.

[0015] By adopting the above scheme, the distance between the end surface of the first partition table and the second partition table close to the mounting seat and the end surface of the substrate is greater than the thickness of the lower end of the first wedge block and greater than the thickness of the lower end of the second wedge block, so as to facilitate the first wedge block and the second wedge block to be embedded in the gap between the substrate and the mounting seat.

[0016] The present invention is further configured as follows: a mounting plate is provided on the base plate, a limiting shaft is provided on the mounting plate and extends downward, a telescopic frame with an upper end telescopically provided on the limiting shaft, a limiting nut is threadedly connected to the lower end of the limiting shaft, a second compression spring is sleeved on the limiting shaft and both ends are pressed against between the mounting plate and the telescopic frame, the elastic metal paper pressing sheet is provided at the lower end of the telescopic frame, an opening groove is provided on the elastic metal paper pressing sheet for the slitting knife to pass through and does not affect the movement of the slitting knife with the adjustment plate, the end of the elastic metal paper pressing sheet away from the telescopic frame is the entry direction of the corrugated cardboard, and the end of the elastic metal paper pressing sheet away from the telescopic frame is tilted upward.

[0017] By adopting the above solution, the elasticity of the elastic metal paper pressing sheet itself, in cooperation with the elasticity of the second compression spring, can realize compression of corrugated paperboards of different thicknesses to ensure the slitting flatness during the longitudinal slitting process.

[0018] The present invention is further configured as follows: it also includes a suction device that is communicated with the recessed groove and can realize suction of debris generated during the longitudinal slitting process, the suction device includes an exhaust fan, an air inlet main duct connected to the air inlet end of the exhaust fan, a plurality of air inlet branch ducts connected between the air inlet main duct and the recessed groove, and a dust removal bag connected to the air outlet end of the exhaust fan.

[0019] By adopting the above scheme, the debris generated during the longitudinal slitting process will fall into the recessed groove. When the exhaust fan is running, the debris can enter the dust removal bag along the recessed groove, the air inlet branch duct, the air inlet main duct, and the exhaust fan for collection; in addition, the suction device also has a certain adsorption force on the lower surface of the corrugated cardboard, which can also prevent the corrugated cardboard from warping upward during the longitudinal slitting process, and achieve an effect similar to that of an elastic metal paper pressing sheet.

[0020] The present invention is further configured as follows: the exhaust fan is connected to the middle of the main air inlet duct, and both ends of the recessed groove are respectively provided with covering mechanisms for covering the recessed groove portion not covered by the corrugated cardboard to increase the negative pressure suction effect, and the covering mechanism includes a fixing plate embedded in the recessed groove in a "horizontal, vertical and horizontal" shape, a limiting column arranged on the fixing plate and passing through the air inlet branch duct and embedded in the main air inlet duct, a sealing ring embedded in the periphery of the limiting column and pressed against the inner wall of the air inlet branch duct, an adjusting plate telescopically arranged on the top of the fixing plate, and an adjusting component arranged between the fixing plate and the adjusting plate.

[0021] By adopting the above scheme, since the width of the corrugated cardboard may be smaller than the length of the concave groove, at this time, because the corrugated cardboard completely covers the concave groove, the negative pressure formed when the suction device is working will be weakened; by providing a covering mechanism, the limiting column on the fixed plate of the covering mechanism is embedded in the main air inlet duct, which has a certain blocking effect on the unused air inlet branch ducts at the edge, thereby improving the negative pressure suction strength of the air inlet branch duct located under the corrugated cardboard; in addition, a relatively closed cavity is also formed between the fixed plate, the adjusting plate and the corrugated cardboard, which can improve the suction effect on debris.

[0022] The present invention is further configured as follows: the adjusting piece is in a "horizontal-vertical" type, and the adjusting assembly includes a third compression spring which is arranged on the vertical part of the adjusting piece and the vertical part of the fixing piece and drives the adjusting piece to move in a direction away from the corrugated cardboard, two guide rods with one end arranged on the vertical part of the adjusting piece and the other end passing through the vertical part of the fixing piece, and an adjusting screw with one end rotatably connected to the vertical part of the fixing piece and the other end threadedly connected to the vertical part of the adjusting piece.

[0023] By adopting the above solution, the position of the adjusting piece can be adjusted by rotating the adjusting screw, so that the adjusting piece is close to the end of the corrugated paperboard after adjustment.

[0024] The present invention is further configured as follows: a flexible rubber buffer sheet is provided at one end of the adjustment sheet close to the corrugated paperboard.

[0025] By adopting the above solution, the flexible rubber buffer sheet has the effects of buffering and providing sealing at the contact point. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the structure of the present invention (without the covering mechanism installed);

[0027] Figure 2 It is a schematic diagram of the proof structure of the longitudinal slitting and pressing device of the present invention;

[0028] Figure 3 It is a schematic diagram of the back structure of the longitudinal slitting and pressing device of the present invention;

[0029] Figure 4 It is a structural exploded diagram of the longitudinal slitting and pressing device of the present invention;

[0030] Figure 5 It is a partial structural schematic diagram of the longitudinal slitting and pressing device of the present invention;

[0031] Figure 6 It is a structural schematic diagram of installing a covering mechanism in a recessed groove of a workbench in the present invention;

[0032] Figure 7 It is a structural schematic diagram of the covering mechanism in the present invention.

[0033] Figure numerals: 1, frame; 11, sliding shaft; 12, rotating shaft; 13, driving motor; 2, workbench; 21, recessed groove; 3, longitudinal cutting and pressing device; 31, base plate; 311, first arc groove; 312, second arc groove; 313, third arc groove; 32, driving pulley; 33, adjusting plate; 331, first arc block; 332, second arc block; 333, mounting seat; 334, elastic component; 3341, first compression spring; 3342, locking nut; 335, rotating seat; 3351, hexagonal column; 336, linkage component; 3351, first wedge block; 3362, second wedge block; 3363, arc rack; 3364, gear ring; 337, limit bracket; 338, first partition table; 339. Second partition table; 3310. Guide shaft; 34. Driven pulley; 341. Connecting pipe; 3411. Hexagon socket hole; 35. Conveyor belt; 36. Slitting knife; 37. Driving cylinder; 38. Elastic metal paper pressing sheet; 381. Mounting plate; 382. Limiting shaft; 383. Telescopic frame; 384. Limiting nut; 385. Second compression spring; 4. Indentation device; 6. Suction device; 51. Exhaust fan; 52. Main air inlet duct; 53. Branch air inlet duct; 54. Dust bag; 7. Covering mechanism; 61. Fixing plate; 62. Limiting column; 63. Sealing ring; 64. Adjusting plate; 65. Adjusting assembly; 651. Third compression spring; 652. Guide rod; 653. Adjusting screw; 654. Flexible rubber buffer. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0035] Embodiment: A longitudinal slitting and creasing device for a corrugated board production line, such as Figure 1 As shown, it includes a frame 1, a workbench 2 arranged on the frame 1 and for transmitting corrugated cardboard, a plurality of longitudinal slitting and pressing devices 3 arranged on the frame 1, a creasing device 4, and a suction device 5. A concave groove 21 extending along the arrangement direction of the plurality of longitudinal slitting and pressing devices 3 is formed below the workbench 2 corresponding to the longitudinal slitting and pressing devices 3. The suction device 5 is communicated with the concave groove 21 and realizes the suction of debris generated in the longitudinal slitting process.

[0036] like Figures 1 to 3As shown, two sliding shafts 11 are arranged on the frame 1, a rotating shaft 12 in the shape of a regular polygon is rotatably connected to the frame 1, and a driving motor 13 for driving the rotating shaft 12 to rotate is arranged on the frame 1. The longitudinal slitting and pressing device 3 comprises a base plate 31 slidably connected to the two sliding shafts 11 and capable of being locked, a driving pulley 32 slidably arranged on the rotating shaft 12 and rotatably connected to the base plate 31, an adjusting plate 33 slidably arranged on the base plate 31 around the rotating axis of the driving pulley 32, a driven pulley 34 rotatably connected to the adjusting plate 33, a transmission belt 35 arranged between the driving pulley 32 and the driven pulley 34, a slitting knife 36 linked to the driven pulley 34, a driving cylinder 37 whose two ends are hinged between the base plate 31 and the adjusting plate 33 to drive the base plate 31 to slide in an arc, and an elastic metal pressing sheet 38 arranged on the base plate 31 and used to press the corrugated cardboard part on both sides of the slitting knife 36.

[0037] like Figure 1 , Figure 3 and Figure 4 As shown, the part of the base plate 31 that is slidably connected to the sliding shaft 11 has a locking knob bolt for locking and fixing. The base plate 31 is provided with a first arc groove 311, a second arc groove 312, and a third arc groove 313 located between the first arc groove 311 and the second arc groove 312, with the center of the circle on the rotating shaft 12 of the driving pulley 32. The adjustment plate 33 is provided with a first arc block 331 slidably arranged in the first arc groove 311, and a second arc block 332 slidably arranged in the second arc groove 312.

[0038] like Figure 4 and Figure 5As shown, the driven pulley 34 is provided with a connecting tube 341 slidably set in the third arc groove 313 and having a hexagonal hole 3411, the first arc block 331 and the second arc block 332 are telescopically provided with a mounting seat 333 that is movable along the axial direction of the connecting tube 341, and an elastic component 334 is provided at both ends of the mounting seat 333 and between the first arc block 331 and the second arc block 332 to drive the mounting seat 333 to move toward the direction close to the connecting tube 341, and the mounting seat 333 is rotatably connected with a rotating seat 335 having a hexagonal column 3351 matching the hexagonal hole 3411, and the slitting knife 36 is arranged on the rotating seat 335, and the hexagonal column 3351 is embedded in the hexagonal hole 3411 under the elastic force of the elastic component 334 to realize the linkage between the driven pulley 34 and the rotating seat 335. At the same time, a linkage assembly 336 is arranged between the base plate 31 and the mounting seat 333. When the adjusting plate 33 moves upward along the first arc groove 311 and the second arc groove 312, when the adjusting plate 33 moves to the middle of the stroke, the linkage assembly 336 starts to drive the hexagonal column 3351 and the hexagonal hole 3411 to gradually move to a disengaged state; when the adjusting plate 33 moves downward along the first arc groove 311 and the second arc groove 312, when the adjusting plate 33 moves to the middle of the stroke, the linkage assembly 336 starts to drive the hexagonal column 3351 to gradually embed into the hexagonal hole 3411.

[0039] For example, the linkage assembly 336 includes a first wedge block 3361 disposed on the base plate 31 and located between the first arc groove 311 and the third arc groove 313, a second wedge block 3362 disposed on the base plate 31 and located between the second arc groove 312 and the third arc groove 313, an arc-shaped rack 3363 disposed below the middle of the third arc groove 313, and a gear ring 3364 disposed on the peripheral side of the connecting tube 341 and meshing with the arc-shaped rack 3363; when the adjusting plate 33 moves upward to the middle of the stroke, the first wedge block 3361, the second wedge block 3362, the arc-shaped rack 3363, the arc-shaped rack 3363, the arc-shaped rack 3363, the arc-shaped rack 3363 and the arc-shaped rack 3363 are meshed with each other. The lower ends of the two wedge blocks 3362 are embedded in the gap between the base plate 31 and the mounting seat 333, and gradually drive the mounting seat 333 to overcome the elastic force of the elastic component 334 so that the hexagonal hole 3411 and the hexagonal column 3351 are separated; when the adjustment plate 33 moves downward to the middle of the stroke, the gear ring 3364 and the arc-shaped rack 3363 engage with each other to drive the connecting tube 341 to rotate, and the hexagonal column 3351 is embedded in the hexagonal hole 3411 under the elastic force of the elastic component 334 when it is just in a state corresponding to the hexagonal hole 3411.

[0040] like Figure 4 and Figure 5As shown, the first arc block 331 is provided with a first partition 338 protruding from the first arc groove 311, and the second arc block 332 is provided with a second partition 339 protruding from the second arc groove 312. The first partition 338 and the second partition 339 are both provided with guide shafts 3310 passing through both ends of the mounting seat 333. The elastic component 334 includes a first compression spring 3341 sequentially sleeved on the guide shaft 3310 and a locking nut 3342 threadedly connected to the end of the guide shaft 3310. The distance between the end surface of the first partition 338 and the second partition 339 close to the mounting seat 333 and the end surface of the substrate 31 is greater than the thickness of the lower end of the first wedge block 3361 and greater than the thickness of the lower end of the second wedge block 3362. At the same time, a limit bracket 337 is provided on the base plate 31 to achieve abutment against the end surface of the mounting seat 333 away from the base plate 31. When the adjustment plate 33 moves upward from the lower end to the state where the gear ring 3364 and the arc-shaped rack 3363 are meshed, the limit bracket 337 remains in a state of abutment against the end surface of the mounting seat 333 away from the base plate 31.

[0041] like Figure 1 and Figure 2 As shown, the base plate 31 is provided with a mounting plate 381, a limit shaft 382 arranged on the mounting plate 381 and extending downward, a telescopic frame 383 telescopically arranged on the limit shaft 382 at the upper end, and a limit nut 384 threadedly connected to the lower end of the limit shaft 382 (see Figure 1 ), a second compression spring 385 which is sleeved on the limit shaft 382 and has its two ends pressed against the mounting plate 381 and the telescopic frame 383, an elastic metal paper pressing piece 38 is arranged at the lower end of the telescopic frame 383, and an opening groove (not marked in the figure) is provided on the elastic metal paper pressing piece 38 for the slitting knife 36 to pass through without affecting the movement of the slitting knife 36 along the adjustment plate 33, the end of the elastic metal paper pressing piece 38 away from the telescopic frame 383 is the entry direction of the corrugated cardboard, and the end of the elastic metal paper pressing piece 38 away from the telescopic frame 383 is tilted upward.

[0042] like Figure 1 As shown, the suction device 5 includes an exhaust fan 51, an air inlet main duct 52 connected to the air inlet end of the exhaust fan 51, a plurality of air inlet branch ducts 53 connected between the air inlet main duct 52 and the concave groove 21, and a dust removal bag 54 connected to the air outlet end of the exhaust fan 51. The exhaust fan 51 and the air inlet main duct 52 are connected in the middle.

[0043] like Figure 1 , Figure 6 and Figure 7As shown, both ends of the recessed groove 21 are respectively provided with covering mechanisms 6 for covering the portion of the recessed groove 21 not covered by the corrugated cardboard to increase the negative pressure suction effect. The covering mechanism 6 includes a fixing plate 61 embedded in the recessed groove 21 in a "horizontal, vertical and horizontal" shape, a limiting column 62 arranged on the fixing plate 61 and passing through the air inlet branch duct 53 and embedded in the air inlet main duct 52, a sealing ring 63 embedded in the side of the limiting column 62 and pressed against the inner wall of the air inlet branch duct 53, an adjusting plate 64 telescopically arranged on the top of the fixing plate 61, and an adjusting component 65 arranged between the fixing plate 61 and the adjusting plate 64. The adjusting piece 64 is in a "horizontal and vertical" type, and the adjusting assembly 65 includes a third compression spring 651 arranged on the vertical part of the adjusting piece 64 and the vertical part of the fixing piece 61 and driving the adjusting piece 64 to move in a direction away from the corrugated cardboard, two guide rods 652 with one end arranged on the vertical part of the adjusting piece 64 and the other end passing through the vertical part of the fixing piece 61, and an adjusting screw 653 with one end rotatably connected to the vertical part of the fixing piece 61 and the other end threadedly connected to the vertical part of the adjusting piece 64. A flexible rubber buffer sheet 654 is arranged at one end of the adjusting piece 64 close to the corrugated cardboard.

[0044] Implementation effect: when the driving motor 13 drives the rotating shaft 12 to rotate, the active pulley 32, the transmission belt 35, and the driven pulley 34 can be used to drive the slitting knife 36 to rotate to achieve longitudinal slitting, thereby achieving the effect of the same driving motor 13 driving multiple slitting knives 36 to operate; and when some slitting knives 36 are not needed, the driving cylinder 37 drives the base plate 31 to slide in an arc so that the slitting knife 36 rotates upward to avoid cutting the corrugated cardboard during the rotation of the slitting knife 36, which is convenient for use; at the same time, no matter what position the slitting knife 36 is in, the elastic metal paper pressing sheet 38 can be pressed against the upper surface of the corrugated cardboard to improve the flatness of the corrugated cardboard on the workbench 2, thereby improving the cutting flatness of the longitudinal slitting.

[0045] In the process of driving the base plate 31 to slide in an arc by driving the cylinder 37 so that the scoring cutter 36 rotates upward and then separates from the corrugated cardboard, when the adjusting plate 33 moves to the middle of the stroke, the linkage component 336 begins to drive the hexagonal column 3351 and the hexagonal hole 3411 to gradually move to a disengaged state, thereby disconnecting the scoring cutter 36 and the driven pulley 34 to prevent the scoring cutter 36 from rotating; in the process of the adjusting plate 33 moving downward and resetting along the first arc groove 311 and the second arc groove 312, when the adjusting plate 33 moves to the middle of the stroke, the linkage component 336 begins to drive the hexagonal column 3351 to gradually embed into the hexagonal hole 3411, thereby realizing the linkage between the driven pulley 34 and the cutting knife 36; in addition, during the process of the cutting knife 36 rotating upward, the height position of the cutting knife 36 can be adjusted within a certain range.

[0046] When the adjustment plate 33 moves upward to the middle of its stroke, the lower ends of the first wedge block 3361 and the second wedge block 3362 are embedded in the gap between the base plate 31 and the mounting seat 333, and gradually drive the mounting seat 333 to overcome the elastic force of the elastic component 334 so that the hexagonal hole 3411 and the hexagonal column 3351 are separated; when the adjustment plate 33 moves downward to the middle of its stroke, the gear ring 3364 and the arc-shaped rack 3363 engage with each other to drive the connecting tube 341 to rotate, and the hexagonal column 3351 is embedded in the hexagonal hole 3411 under the elastic force of the elastic component 334 when it is just in the state corresponding to the hexagonal hole 3411; finally, the functions of disconnecting the linkage and resetting the linkage are realized.

[0047] The debris generated during the longitudinal slitting process will fall into the concave groove 21. When the exhaust fan 51 is running, the debris can enter the dust removal bag 54 along the concave groove 21, the air inlet branch duct 53, the air inlet main duct 52, and the exhaust fan 51 for collection; in addition, the suction device 5 also has a certain adsorption force on the lower surface of the corrugated cardboard, which can also prevent the corrugated cardboard from warping upward during the longitudinal slitting process, and has a similar effect to the elastic metal paper pressing sheet 38. Since the width of the corrugated cardboard may be smaller than the length of the recessed groove 21, the negative pressure formed when the suction device 5 is working will be weakened because the corrugated cardboard completely covers the recessed groove 21. By providing the covering mechanism 6, the limiting column 62 on the fixing plate 61 of the covering mechanism 6 is embedded in the main air inlet duct 52, which has a certain blocking effect on the unused air inlet branch duct 53 at the edge, thereby improving the negative pressure suction strength of the air inlet branch duct 53 located under the corrugated cardboard. In addition, a relatively closed cavity is formed between the fixing plate 61, the adjusting plate 64 and the corrugated cardboard, which can improve the suction effect on debris.

[0048] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A longitudinal slitting and creasing device for a corrugated cardboard production line, comprising a frame (1), a workbench (2) arranged on the frame (1) and for conveying corrugated cardboard, a plurality of longitudinal slitting and pressing devices (3) arranged on the frame (1), and a creasing device (4), wherein a concave groove (21) extending along the arrangement direction of the plurality of longitudinal slitting and pressing devices (3) is formed below the workbench (2) corresponding to the longitudinal slitting and pressing devices (3), Features: The frame (1) is provided with two sliding shafts (11), a rotating shaft (12) in the form of a regular polygon is rotatably connected to the frame (1), and a driving motor (13) for driving the rotating shaft (12) to rotate is provided on the frame (1); The longitudinal slitting and pressing device (3) comprises a base plate (31) slidably connected to two sliding shafts (11) and capable of being locked in position, a driving pulley (32) slidably arranged on a rotating shaft (12) and rotatably connected to the base plate (31), an adjusting plate (33) slidably arranged on the base plate (31) around the rotating axis of the driving pulley (32), a driven pulley (34) rotatably connected to the adjusting plate (33), a transmission belt (35) arranged between the driving pulley (32) and the driven pulley (34), a slitting knife (36) linked to the driven pulley (34), a driving cylinder (37) with two ends hinged between the base plate (31) and the adjusting plate (33) to drive the base plate (31) to slide in an arc shape, and an elastic metal paper pressing sheet (38) arranged on the base plate (31) and used to press the corrugated paperboard parts on both sides of the slitting knife (36); The base plate (31) is provided with a first arc groove (311), a second arc groove (312), and a third arc groove (313) located between the first arc groove (311) and the second arc groove (312), the center of which is located on the rotation axis of the driving pulley (32); the adjustment plate (33) is provided with a first arc block (331) slidably arranged in the first arc groove (311), and a second arc block (332) slidably arranged in the second arc groove (312); the driven pulley (34) is provided with a connecting pipe (341) slidably arranged in the third arc groove (313) and having a hexagonal inner hole (3411); the first arc block (331) and the second arc block (332) are telescopically provided with A mounting seat (333) movable along the axial direction of the connecting tube (341); an elastic component (334) is provided between the two ends of the mounting seat (333) and the first arc block (331) and the second arc block (332) to drive the mounting seat (333) to move in a direction close to the connecting tube (341); a rotating seat (335) having an inner hexagonal column (3351) matching the inner hexagonal hole (3411) is rotatably connected to the mounting seat (333); the slitting knife (36) is provided on the rotating seat (335); the inner hexagonal column (3351) is embedded in the inner hexagonal hole (3411) under the elastic force of the elastic component (334) to realize the linkage between the driven pulley (34) and the rotating seat (335); A linkage assembly (336) is provided between the base plate (31) and the mounting seat (333); when the adjustment plate (33) moves upward along the first arc groove (311) and the second arc groove (312), the adjustment plate (33) moves to the middle of the stroke and starts to drive the hexagonal column (3351) and the hexagonal hole (3411) to gradually move to a disengaged state under the action of the linkage assembly (336); and when the adjustment plate (33) moves downward along the first arc groove (311) and the second arc groove (312), when the adjustment plate (33) moves to the middle of the stroke and starts to drive the hexagonal column (3351) to gradually embed into the hexagonal hole (3411) under the action of the linkage assembly (336).

2. The longitudinal slitting and creasing device for a corrugated board production line according to claim 1, Features: The linkage assembly (336) comprises a first wedge-shaped block (3361) disposed on the base plate (31) and located between the first arc-shaped groove (311) and the third arc-shaped groove (313), a second wedge-shaped block (3362) disposed on the base plate (31) and located between the second arc-shaped groove (312) and the third arc-shaped groove (313), an arc-shaped rack (3363) disposed below the middle of the third arc-shaped groove (313), and a gear ring (3364) disposed on the peripheral side of the connecting tube (341) and meshing with the arc-shaped rack (3363); when the adjusting plate (33) moves upward to the middle of the stroke, the first wedge-shaped block (3361) and the second wedge-shaped block (3362) are engaged with the arc-shaped rack (3363). The lower ends of the two wedge-shaped blocks (3362) are embedded in the gap between the base plate (31) and the mounting seat (333), and gradually drive the mounting seat (333) to overcome the elastic force of the elastic component (334) so ​​that the hexagonal hole (3411) and the hexagonal column (3351) are separated; when the adjustment plate (33) moves downward to the middle of the stroke, the gear ring (3364) and the arc-shaped rack (3363) mesh to drive the connecting pipe (341) to rotate, and the hexagonal column (3351) is embedded in the hexagonal hole (3411) when it is just in a state corresponding to the hexagonal hole (3411) under the elastic force of the elastic component (334).

3. The longitudinal slitting and creasing device for a corrugated board production line according to claim 2, Features: The base plate (31) is provided with a limit bracket (337) for contacting the end surface of the mounting seat (333) away from the base plate (31); when the adjustment plate (33) moves upward from the lowermost end to a state where the gear ring (3364) and the arc-shaped rack (3363) are meshed, the limit bracket (337) remains in a state of contacting the end surface of the mounting seat (333) away from the base plate (31).

4. The longitudinal slitting and creasing device for a corrugated board production line according to claim 1, Features: The first arc block (331) is provided with a first partition (338) protruding from the first arc groove (311), and the second arc block (332) is provided with a second partition (339) protruding from the second arc groove (312). The first partition (338) and the second partition (339) are both provided with guide shafts (3310) passing through the two ends of the mounting seat (333). The elastic component (334) comprises a first compression spring (3341) sequentially sleeved on the guide shaft (3310) and a locking nut (3342) threadedly connected to the end of the guide shaft (3310). The distance between the end surface of the first partition (338) and the second partition (339) close to the mounting seat (333) and the end surface of the base plate (31) is greater than the thickness of the lower end of the first wedge block (3361) and greater than the thickness of the lower end of the second wedge block (3362).

5. The longitudinal slitting and creasing device for a corrugated board production line according to claim 1, Features: The base plate (31) is provided with a mounting plate (381), a limiting shaft (382) arranged on the mounting plate (381) and extending downward, a telescopic frame (383) with an upper end telescopically arranged on the limiting shaft (382), a limiting nut (384) threadedly connected to the lower end of the limiting shaft (382), and a second compression spring (385) sleeved on the limiting shaft (382) with both ends pressed against between the mounting plate (381) and the telescopic frame (383); the elastic metal paper pressing sheet (38) is arranged at the lower end of the telescopic frame (383); an opening groove is provided on the elastic metal paper pressing sheet (38) for the slitting knife (36) to pass through and does not affect the movement of the slitting knife (36) along the adjustment plate (33); one end of the elastic metal paper pressing sheet (38) away from the telescopic frame (383) is in the direction of entry of the corrugated paperboard, and one end of the elastic metal paper pressing sheet (38) away from the telescopic frame (383) is tilted upward.

6. The longitudinal slitting and creasing device for a corrugated board production line according to claim 1, Features: It also includes a suction device (5) that is in communication with the recessed groove (21) and is used to suck debris generated during the longitudinal slitting process, the suction device (5) comprising an exhaust fan (51), an air intake main duct (52) connected to the air intake end of the exhaust fan (51), a plurality of air intake branch ducts (53) connected between the air intake main duct (52) and the recessed groove (21), and a dust removal bag (54) connected to the air outlet end of the exhaust fan (51).

7. The longitudinal slitting and creasing device for a corrugated board production line according to claim 6, Features: The exhaust fan (51) is connected to the middle of the main air inlet duct (52), and covering mechanisms (6) are respectively provided at both ends of the recessed groove (21) to cover the portion of the recessed groove (21) not covered by the corrugated cardboard to increase the negative pressure suction effect. The covering mechanism (6) comprises a fixing plate (61) embedded in the recessed groove (21) in a "horizontal, vertical and horizontal" shape, a limiting column (62) arranged on the fixing plate (61) and passing through the air inlet branch duct (53) and embedded in the main air inlet duct (52), a sealing ring (63) embedded in the side of the limiting column (62) and pressed against the inner wall of the air inlet branch duct (53), an adjusting plate (64) telescopically arranged on the top of the fixing plate (61), and an adjusting component (65) arranged between the fixing plate (61) and the adjusting plate (64).

8. The longitudinal slitting and creasing device for a corrugated board production line according to claim 7, Features: The adjusting piece (64) is in a "horizontal-vertical" shape, and the adjusting assembly (65) comprises a third compression spring (651) arranged on the vertical portion of the adjusting piece (64) and the vertical portion of the fixing piece (61) and driving the adjusting piece (64) to move in a direction away from the corrugated cardboard, two guide rods (652) one end of which is arranged on the vertical portion of the adjusting piece (64) and the other end of which passes through the vertical portion of the fixing piece (61), and an adjusting screw (653) one end of which is rotatably connected to the vertical portion of the fixing piece (61) and the other end of which is threadedly connected to the vertical portion of the adjusting piece (64).

9. The longitudinal slitting and creasing device for a corrugated board production line according to claim 8, Features: A flexible rubber buffer sheet (654) is provided at one end of the adjustment sheet (64) close to the corrugated paperboard.

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