CN111421586A - A device for automatically adjusting the angle of web breakage - Google Patents

Abstract

A device for automatically adjusting the breaking angle of web paper. The invention is to solve the problem that the prior art cannot automatically cut the front edge and the side edge of the flat sheet at right angles from the roll paper, and cannot meet the requirements of accurate overprinting of multi-color printing. Technical points: including web breaking device, web flattening device, web conveying roller and flat sheet conveying device, characterized in that the web breaking device includes a knife holder base, a knife holder, a broken sheet rotary knife, Fixed lower knife, photoelectric sensor, web side gauge, driven rack, drive gear, motor, the tool holder is installed on the base of the tool holder, one side is hinged, the other side is movable fit, break the rotating knife It is transferred to the knife holder, and the fixed lower knife is installed at the position of the broken rotating knife. There is a cantilever on one side of the knife holder. The photoelectric sensor is installed on the cantilever. The detection beam is irradiated downward, and the motor is driven and connected to the other side of the tool holder through the driving gear and the driven rack.

Description

A device for automatically adjusting the angle of web breakage

technical field

The invention relates to a cutting device for roll paper, in particular to a device for automatically adjusting the breaking angle of roll paper.

Background technique

Paper production often requires cutting webs into sheets. In order to meet the multi-color overprinting accuracy requirements of the printed pattern, it must be required that the bite of the flat sheet (front paper edge) and the drawing edge (side paper edge) be at right angles (90°). In the traditional printing process, before printing on the machine, the processing enterprise or printing factory must manually cut the flat paper to be printed, and cut the bite of the flat paper on the paper cutter For a right angle, not only the processing procedure is increased, the processing cost is increased, but also the improvement of production efficiency is affected. There is currently no device that automatically cuts the front and side edges of the paper at right angles (90°) when the roll is cut to a flat sheet.

An intelligent paper cutter disclosed in Chinese Patent Application No. 201420557031.2, the structure includes a cutter, a knife holder, and a telescopic cylinder, the cutter is fixed on the knife holder, and the knife holder is fixedly connected to the telescopic cylinder, It is characterized in that a paper-cutting platform is arranged under the cutter, and a paper pusher is arranged on the paper-cutting platform. There is a paper press between them, the paper press is located above the paper cutting platform, the other side of the cutter is provided with an upper conveying pressure roller and a lower conveying pressure roller, and the upper conveying pressure roller is fixed with the upper push-pull cylinder The lower conveying pressure roller is fixedly connected with the lower push-pull cylinder, the left and right deflection sensors are respectively fixed on both sides of the tool holder, and the left deflection sensor and the right deflection sensor are respectively connected with the controller, so The controller is respectively connected with the upper push-pull cylinder and the lower push-pull cylinder. The features of this scheme: first, the paper will not be scattered during the cutting process through the unwinder and the paper press; the second is to correct the left and right deviation of the roll paper during the conveying process by automatically controlling the left and right movement of the upper and lower conveying pressure rollers. Overcome the inclination of the cut flat paper caused by the left and right deviation of the paper. But its disadvantage is that it cannot guarantee that the front edge and side edge of the cut flat paper are at an accurate right angle (90°), and it cannot adapt to the non-parallel between the side edge of the paper and the conveying direction of the paper. The front edge of the paper and the side edge of the paper are not at right angles, so the cut sheet of paper cannot meet the requirements of multi-color accurate overprinting of the printed pattern.

Chinese Patent Application No. 201720793637.X discloses an automatic rectifying device for slitting knives. The structure includes a first control box and a second control box, which are respectively arranged at both ends of the double rubber roller take-up shaft. The first control box is installed in the first control box. There is a controller, a motor is fixed on the outside of the second control box through a mounting bracket, the transmission shaft of the motor is connected with a screw rod in the second control box through a coupling, and the end of the screw rod is fixed on the fine-tuning bracket , the fine adjustment bracket is connected with the adjusting shaft of the cutter through a pressure bearing, a position sensor is installed on the upper end of the second control box, and the position sensor transmits the detected cloth offset signal to the controller, and the signal of the controller The output is connected to the motor control. The feature of this scheme is: when the flag cloth is conveyed on the equipment and moves to the left or right, the servo motor drives the screw to move left and right, and the screw drives the adjustment shaft of the cutter to move left and right through the fine-tuning bracket, and then carries the dividing The knives move together to correct the offset of the slitting knives and realize automatic correction. However, this solution cannot guarantee that the front selvedge and side selvedge of the flag cut out in the subsequent process are at an accurate right angle (90°), so it is not suitable for cutting from roll paper to flat paper. Equipment required for color-accurate overprinting.

SUMMARY OF THE INVENTION

In order to overcome the fact that there is no device that can automatically cut the front edge and side edge of the paper into right angles (90°) when the roll paper is cut into flat paper, the existing equipment automatically cuts the flat paper. The problem that the multi-color accurate overprinting of the printed pattern cannot be satisfied, and the purpose of the present invention is to provide an improved device for automatically adjusting the breaking angle of the web, which can overcome the defects of the prior art.

The technical scheme adopted by the present invention to solve the technical problem is as follows: a device for automatically adjusting the breaking angle of the roll paper, comprising a roll paper breaking device, a roll paper spreader arranged in front of the roll paper breaking device A flattening device, a web conveying roller arranged between the web unwinding device and the web breaking device, and a flat sheet conveying device arranged behind the web breaking device, which It is characterized in that: the roll paper breaking device includes a knife rest base, a knife rest, a broken rotating knife, a fixed lower knife, a photoelectric sensor, a web side gauge, a driven rack, a driving gear, and a motor, wherein the The tool holder is installed on the tool holder base from both sides, and one side is hinged on the tool holder base, and the other side is movably matched with the tool holder base, and the break-off rotary knife Rotatingly fit on both sides of the knife holder, the fixed lower knife is installed on the knife holder at the position where it is matched with the breaking rotary knife, and one side or the other side of the knife holder is provided with a direction. A cantilever extending in front, the photoelectric sensor is installed on the front end of the cantilever, the web side is arranged on one side of the cantilever or the tool holder base on the other side of the cantilever, the photoelectric The detection beam of the sensor is irradiated downward, the driven rack fixed on the tool holder is movably fitted on the other side of the tool holder base, the motor is installed on the tool holder base, so The drive gear is fixed on the output shaft of the motor and meshes with the driven rack.

The included angle between the line connecting the positioning base point of the web side gauge and the irradiation base point of the detection beam and the edge line of the fixed lower knife may be set to be a right angle (90°). The positioning base point of the roll paper side gauge refers to the contact point on the roll paper side gauge that first comes into contact with the side edge of the roll paper during the transport process of the roll paper; the irradiation base point of the detection beam refers to when the roll During the web transport process, when the included angle between the side of the web and the edge line of the fixed lower knife is an exact right angle (90°), the detection beam is the spot where the detection beam just contacts the side of the web.

According to the above technical solution, the photoelectric sensor can use a photoelectric sensor that can emit red, blue and green detection beams respectively. For best contrast and best detection accuracy.

In the above technical solution, the motor can use a servo motor with a PID controller with variable speed control, which is used to realize the speed adjustment of the driving speed of the driving gear, so as to achieve the fine adjustment of the web breakage angle. The driving speed of the driving gear is slow; when the roll paper breakage angle is largely adjusted roughly, the driving speed of the driving gear is fast.

In the above technical solution, the roll paper flattening device can be a four-roll flattening device, and the purpose of flattening the paper surface can be achieved by adjusting the paper surface tension of the roll paper to be uniform. The four-roller flattening device can be composed of a feeding roller, a longitudinal flattening roller assembly composed of two longitudinal flattening rollers and a roller angle adjustment mechanism, and a horizontal flattening roller with a roll angle adjustment mechanism. It is composed of the horizontal leveling roller assembly composed of the mechanism.

The sheet-fed paper conveying device described in the above technical solution may adopt a belt conveying mechanism.

A camera can also be installed on the front of the cantilever in the above technical solution, and the camera is connected to a display device with a display screen for signal connection, and the contact between the detection beam of the photoelectric sensor and the side of the web can be viewed and monitored in real time. Happening.

The front or back mentioned in the above technical solution is determined according to the order in which the web is transported from front to back.

The beneficial effects of the present invention are: because the roll paper breaking device includes a knife rest base, a knife rest, a broken rotating knife, a fixed lower knife, a photoelectric sensor, a web side gauge, a driven rack, a driving gear, Motor, wherein the tool holder is installed on the tool holder base from both sides, and one side is hinged on the tool holder base, and the other side is movably matched with the tool holder base, so The splitting rotary knife is rotatably fitted on both sides of the knife rest, the fixed lower knife is installed on the knife rest at a position matched with the splitting rotary knife, one side of the knife rest or the other One side is provided with a cantilever extending forward, the photoelectric sensor is installed on the front end of the cantilever, and the web side is arranged on the knife on one side or the other side of the knife holder where the cantilever is located. On the base of the tool holder, the detection beam of the photoelectric sensor is irradiated downward, the driven rack fixed on the tool holder is movably fitted on the other side of the base of the tool holder, and the motor is installed on the On the base of the knife holder, the drive gear is fixed on the output shaft of the motor and meshes with the driven rack, so the roll paper is transported into the blade line of the fixed lower knife. When the included angle between the edge and the blade line of the fixed lower knife is not a right angle, the control circuit of the roll paper breaking device, according to the contact condition of the detection beam of the photoelectric sensor and the side edge of the roll paper, through the motor, drive gear . The driven rack drives the knife holder to rotate, so that the blade line of the fixed lower knife is automatically adjusted to an accurate right angle with the side of the roll paper, so that each piece of paper automatically cut from the roll paper is adjusted. The front edge and the side edge of a flat sheet of paper are exactly right angles, which can effectively reduce the processing steps of printing production, reduce processing costs, improve production efficiency, and effectively improve the quality of multi-color accurate overprinting of patterns. The present invention is currently the only technical solution that can automatically adjust the angle of the paper cutter to adapt the angle between the side of the web and the blade line of the fixed lower knife to correct the cutting that is not a right angle. The defects of this kind of equipment are simple, practical, convenient, and the effect is very ideal.

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Description of drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention.

FIG. 2 is a schematic diagram of a partial cross-sectional view of the right side of FIG. 1 .

FIG. 3 is a schematic top view of FIG. 2 .

In the figure: 1. Roll paper breaking device; 2. Roll paper flattening device; 3 and 4, Roll paper conveying roller; 5. Flat paper conveying device; 6. Knife rest base; 8. Breaking rotary knife; 9. Fixed lower knife; 10. Photoelectric sensor; 11. Web side gauge; 12. Driven rack; 13. Drive gear; 14. Motor; 15. One side of the tool holder; 16. The other side of the knife holder; 17. Cantilever arm; 18. Probe beam; 19. Blade line; 20. Web paper; 21. Paper feed roller; ; 25, vertical leveling roller assembly; 26, horizontal leveling roller; 27, roller angle adjustment mechanism; 28, horizontal leveling roller assembly; 29, camera; 30, hinge shaft; 31, chute; 32, lower 33. Sheet of paper.

Detailed ways

Referring to FIGS. 1 to 3 , the device for automatically adjusting the angle of web breaking includes a web breaking device 1 , a web flattening device 2 arranged in front of the web breaking device 1 , and setting Web feed rollers 3 , 4 between the web unwinding device 2 and the web breaking device 1 and a sheet-fed transfer device arranged behind the web breaking device 1 5, it is characterized in that: the roll paper breaking device 1 comprises a knife rest base 6, a knife rest 7, a breaking rotary knife 8, a fixed lower knife 9, a photoelectric sensor 10, a web side gauge 11, a driven tooth Strip 12, drive gear 13, motor 14, wherein the tool holder 7 is mounted on the tool holder base 6 from both sides, and one side 15 is hinged on the tool holder base 6, and the other side 16 It is movably fitted on the tool rest base 6 , the breaking rotary knife 8 is rotatably matched on both sides of the tool rest 7 , and the fixed lower knife 9 is installed on the tool rest 7 A cantilever 17 extending forward is provided on the other side 16 of the knife holder 7 at the position where the splitting rotary knife 8 is matched. The photoelectric sensor 10 is installed on the front end of the cantilever 17, and the roll The roll paper side gauge 11 is arranged on the tool holder base 6 on the other side 16 of the tool holder 7 where the cantilever 17 is located. The detection beam 18 of the photoelectric sensor 10 illuminates downward, and the driven rack 12 is fixed on the The tool holder 7 is movably fitted on the other side 16 of the tool holder base 6 , the motor 14 is mounted on the tool holder base 6 , and the drive gear 13 is fixed on the output shaft of the motor 14 and meshes with the driven rack 12 .

The included angle between the positioning base point of the web side gauge 11 and the irradiation base point of the detection beam 18 and the blade edge line 19 of the fixed lower knife 9 is set to be a right angle (90°). The positioning base point of the roll paper side gauge 11 refers to the contact point on the roll paper side gauge 11 that first comes into contact with the side edge of the roll paper 20 during the transport process of the roll paper 20; the irradiation of the detection beam 18 The base point means that when the roll paper 20 is transported, when the included angle between the side of the roll paper 20 and the blade line 19 of the fixed lower knife 9 is a right angle (90°), the detection beam 18 is just right with the roll. The spot of light that the side of the web 20 touches.

The photoelectric sensor 10 adopts a photoelectric sensor capable of emitting red, blue or green detection beams 18 respectively. According to the different reflective degrees of the surfaces of different webs 20, the photoelectric sensor 10 can automatically change the most suitable detection beam color. For best contrast and best detection accuracy.

The motor 14 adopts a servo motor with a PID controller with variable speed control, which is used to realize the speed adjustment of the driving speed of the driving gear 13, so as to achieve the fine adjustment of the breaking angle of the web 20, the The driving speed of the driving gear 13 is slow; when the breaking angle of the web 20 is largely adjusted roughly, the driving speed of the driving gear 13 is fast.

The roll paper flattening device 2 adopts a four-roll flattening device. By adjusting the paper surface tension of the roll paper 20 to be uniform, the purpose of flattening the paper surface of the roll paper 20 is achieved. The four-roller flattening device 2 consists of a feeding roller 21, a longitudinal flattening roller assembly 25 composed of two longitudinal flattening rollers 22, 23 and a roller angle adjustment mechanism 24, and a horizontal flattening roller assembly 25. The horizontal leveling roller assembly 28 formed by the flat roller 26 and the roller angle adjustment mechanism 27 is composed.

The flat sheet conveying device 5 adopts a belt conveying mechanism.

A camera 29 is also installed on the front of the cantilever 17, and the camera 29 is connected with a display device (not shown) with a display screen for signal connection, so that the detection beam 18 of the photoelectric sensor 10 can be viewed and monitored in real time. The contact condition of the side edge of the web 20.

One side 15 of the tool holder 7 is hinged on the tool holder base 6 by the hinge shaft 30 at the lower part thereof.

The web conveying rollers 4 are a pair of active pressing rollers.

The other side 16 of the tool holder 7 is movably fitted on the chute 31 of the tool holder base 6 ; the driven rack 12 is fixed on the bottom surface of the other side 16 of the tool holder 7 and meshes with the drive gear 13 through the lower through port 32 in the middle of the chute 31 .

In use, when the roll paper 20 is transported into the roll paper flattening device 2, the longitudinal flattening roller assembly 25 first adjusts the longitudinal surface tension of the roll paper 20 to be uniform, so as to achieve the longitudinal leveling of the roll paper 20, Then, the horizontal surface tension of the roll paper 20 is adjusted to be uniform by the horizontal leveling roller assembly 28 to achieve the horizontal leveling of the roll paper 20; The side of the web 20 is close to the side gauge 11 of the web and enters the blade line 19 of the fixed lower knife 9; at this time, the photoelectric sensor 10 is in contact with the side of the web 20 according to the detection beam 18 emitted by the photoelectric sensor 10. Or in different states of no contact, the signal is sent to the control circuit (not shown), the control circuit sends out instructions, controls the motor 14 to rotate, and drives the other side 16 of the tool holder 7 to wrap around the hinge on one side 15 of the tool holder 7 The shaft 30 rotates, when the detection beam 18 of the photoelectric sensor 10 is in just contact with the side of the roll paper 20, the control circuit controls the motor 14 to stop rotating, and the side of the roll paper 20 is in contact with the fixed lower knife 9. The included angle of the blade line 19 is an accurate right angle (90°); then the control circuit controls the splitting rotary knife 8 to rotate once, and cooperates with the blade line 19 of the fixed lower knife 9 to cut off the front port of the web 20; then The roll paper conveying rollers 3 and 4 further feed the roll paper 20 backward. When the roll paper 20 reaches the length of a flat sheet of paper 33 through the blade line 19 of the fixed lower knife 9, the roll paper conveying roller 3 4. Stop the feeding of the roll paper 20, the photoelectric sensor 10 and the control circuit cooperate according to the method described above, and then the control circuit controls the rotation of the other side 16 of the knife holder 7, so that the side edge of the roll paper 20 is fixed with The included angle of the blade line 19 of the lower knife 9 is an accurate right angle (90°), and then the control circuit controls the breaking rotary knife 8 to rotate once, and cooperates with the blade line 19 of the fixed lower knife 9 to cut the front end of the roll paper 20. A piece of flat paper 33 is output; then the cut flat paper 33 falls on the flat paper conveying device 5 and is sent away; the continuous cycle in turn can automatically cut out the front edge and the side edge one by one. Both are exactly right angle (90°) flat sheets.

Claims (9)

1. A device for automatically adjusting the angle of web breaking, comprising a web breaking device, a web unwinding device arranged in front of the web breaking device, a web unwinding device arranged in the web A roll paper conveying roller between the flat device and the roll paper breaking device and a flat paper transporting device arranged behind the roll paper breaking device, characterized in that: the roll paper breaking device It includes a knife rest base, a knife rest, a broken rotating knife, a fixed lower knife, a photoelectric sensor, a side gauge of the web, a driven rack, a driving gear, and a motor, wherein the knife rest is installed on the knife from both sides. On the base of the frame, one side is hinged on the base of the tool holder, the other side is movably matched with the base of the tool holder, and the breaking rotary knife is rotatably fitted on both sides of the tool holder , the fixed lower knife is installed on the knife holder at the position where it cooperates with the breaking rotary knife, one side or the other side of the knife holder is provided with a cantilever extending forward, and the photoelectric sensor is installed on the On the front end of the cantilever, the roll paper side is arranged on the tool holder base on one side or the other side of the tool holder where the cantilever is located, the detection beam of the photoelectric sensor is irradiated downward, the The movable rack fixed on the tool holder is movably fitted on the other side of the tool holder base, the motor is mounted on the tool holder base, and the drive gear is fixed on the output shaft of the motor and engages with the driven rack. 2. The device for automatically adjusting the angle of web breaking according to claim 1, characterized in that the connection line between the positioning base point of the web side gauge and the irradiation base point of the detection beam and the connection line of the fixed lower knife. The included angle of the blade line is set to a right angle. 3. The device according to claim 1 or 2, wherein the photoelectric sensor is a photoelectric sensor capable of respectively emitting red, blue and green detection beams. 4. The device for automatically adjusting the web breaking angle according to claim 1 or 2, characterized in that the motor adopts a servo motor with a PID controller with variable speed control, for realizing the drive of the drive gear Speed adjustment. 5. The device according to claim 1 or 2, characterized in that the roll paper flattening device adopts a four-roll flattening device, and by adjusting the paper surface tension of the roll paper, the tension is uniform. , to flatten the roll paper, the four-roll flattening device consists of a feeding roller, a longitudinal leveling roller assembly with two longitudinal leveling rollers and a roller angle adjustment mechanism, and a longitudinal leveling roller assembly with a It is composed of a transverse leveling roller assembly composed of a transverse leveling roller and a roller angle adjustment mechanism. 6 . The device for automatically adjusting the breaking angle of web paper according to claim 1 or 2 , wherein the sheet-fed paper conveying device adopts a belt conveying mechanism. 7 . 7 . The device for automatically adjusting the angle of web breaking according to claim 1 or 2 , wherein a camera is also installed on the front part of the cantilever, and the camera is signal-connected to a display device with a display screen. 8 . 8 . The device according to claim 1 or 2 , wherein one side of the blade rest is hinged on the base of the blade rest by a hinge shaft at the lower part. 9 . 9. The device for automatically adjusting the breaking angle of the web according to claim 1 or 2, characterized in that the other side of the blade rest is movably fitted on the chute of the base of the blade rest, and the The movable rack is fixed on the bottom surface of the other side of the tool holder, and meshes with the driving gear through the lower opening in the middle of the chute.

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