An intermittent paper feeder and a tension control system thereof

Abstract

This invention relates to the field of printing equipment technology, and particularly to an intermittent paper feeder and its tension control system, comprising: a mounting frame, a paper feeding component rotatably connected to the end of the mounting frame, two tension components and a pull head mounted on the inner wall of the mounting frame, the pull head being located between the two tension components, a cylinder output end hinged to the side of each tension component, a displacement sensor mounted on the cylinder output end, the cylinder being connected to the inner wall of the mounting frame, the displacement sensor in the tension component monitoring the displacement of the tension component, adjusting the paper feeding speed of the paper feeding component, and maintaining the tension on the printing paper in the device at a constant level.

Description

Technical Field

[0001] This invention relates to the field of printing equipment technology, and in particular to an intermittent paper feeder and its tension control system. Background Technology

[0002] Intermittent paper feeders are important auxiliary equipment for printing presses. Since printing presses need to print on different parts of the paper, intermittent paper feeders need to feed the printing paper intermittently. The advantages of intermittent paper feeders are that they have a simple structure, high working efficiency, and are suitable for production lines of various sizes. Through multiple rollers set in the device, the tension on the printing paper during the feeding process can be evenly distributed, ensuring the integrity of the printing paper.

[0003] However, existing devices still have shortcomings in use. For example, in patent number CN201310267320.9, a paper feeding system for a printing press includes a frame and a printhead. The frame is equipped with a synchronous belt pulley transmission device that can move up and down and at least two sets of synchronous belt pulley transmission mechanisms that can move left and right. The synchronous belt pulley transmission device and the at least two sets of synchronous belt pulley transmission mechanisms are arranged opposite each other, with the synchronous belt pulley transmission device located below. When the printing press needs to intermittently feed the printing paper, this device cannot adjust the conveying speed of the transmission device, resulting in the tension on the printing paper not being kept constant. Summary of the Invention

[0004] The present invention provides an intermittent paper feeder and its tension control system to solve the problems mentioned in the background art.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution: an intermittent paper feeder, comprising: a mounting frame, a paper feeder, a tension member, a pull head, a displacement sensor, and a controller. The paper feeder is rotatably connected to the end of the mounting frame. Two tension members and a pull head are mounted on the inner wall of the mounting frame. The pull head is located between the two tension members. A cylinder output end is hinged to the side of each tension member. A displacement sensor is mounted on the cylinder output end. The cylinder is connected to the inner wall of the mounting frame. The paper feeder, the pull head, and the displacement sensor are connected to the controller.

[0006] Preferably, the tensioning component includes a tension roller, a swing arm, and a paper feed roller. A tension roller is provided on one side of the pull head, and a swing arm is rotatably connected to each end of the tension roller. The top of each swing arm is rotatably connected to a rotating shaft on the inner wall of the mounting frame. The side wall of the swing arm is hinged to the output end of the cylinder. A paper feed roller is rotatably connected to the inner wall of the mounting frame and is located below the tension roller.

[0007] Preferably, the paper feeding component includes: an air shaft, a lifting arm, and a lifting element. Two lifting arms are connected to the second rotating shaft on the inner wall of the mounting frame. The end of the second rotating shaft that extends out to the side wall of the mounting frame is connected to the lifting element. Each lifting arm has an arc-shaped groove at its top end, and the mounting frame has a second arc-shaped groove at its end. The arc-shaped groove and the second arc-shaped groove are fitted to the side wall of the air shaft for rotational connection.

[0008] Preferably, the lifting component includes: a connecting rod, one end of the second rotating shaft extending out of the side wall of the mounting frame and connected to the end of the connecting rod, the side wall of the connecting rod being hinged to the output end of the second cylinder, and the second cylinder being hinged to the side wall of the mounting frame.

[0009] Preferably, the gear at the end of the air shaft meshes with the second gear, the second gear is connected to the motor output end, and the motor is mounted on the side wall of the mounting bracket.

[0010] Preferably, a guide device is provided between the air shaft and the adjacent cylinder. The guide device is connected to the inner wall of the mounting frame. Two second paper feed rollers are provided below the guide device, and each second paper feed roller is rotatably connected between the two inner walls of the mounting frame.

[0011] Preferably, a third cylinder is provided on the other side of the pull head. The third cylinder is connected to the inner wall of the mounting frame. A floating roller is provided between the third cylinder and the mounting frame. The two ends of the floating roller are rotatably connected to a slide block. Each slide block is slidably connected to an inner wall of the mounting frame. A photoelectric sensor is provided on the slide block. The photoelectric sensor and the photoelectric sensor module on the inner wall of the mounting frame sense each other. Both the photoelectric sensor and the photoelectric sensor module are connected to the controller. The bottom end of the slide block is connected to the inner wall of the mounting frame through a return spring.

[0012] Preferably, a pull roller is provided between the floating roller and the mounting frame, and each end of the pull roller is rotatably connected to a slider. Each slider is slidably connected to an inner wall of the mounting frame, and the slider is connected to the synchronous belt of the synchronous pulley mechanism, which is located on the inner wall of the mounting frame.

[0013] Preferably, the air shaft includes: a retaining groove, a guide groove, an air strip, and a positioning element. The side wall of the air shaft has multiple retaining grooves, and the bottom end of the retaining groove has a through groove. The inner wall of the air shaft is connected to one end of the guide groove. The guide groove and the through groove are concentrically arranged. An air strip is slidably connected in the through groove. The positioning element is installed in the air strip. The guide arc at the bottom end of the air strip is slidably sealed with the guide groove. The top surface of the guide arc is connected to the inner wall of the air shaft through multiple compression springs. A one-way valve is installed in the air inlet at the end of the air shaft.

[0014] The beneficial effects of this invention are as follows:

[0015] In the solution of this invention:

[0016] 1. The displacement sensor in the tension component monitors the displacement of the tension component, adjusts the paper feeding speed of the paper feeding component, and keeps the tension on the printing paper in the device constant.

[0017] 2. To prevent the printing paper from being damaged due to insufficient rotation speed of the paper feeder when the end of the printing paper is suddenly subjected to tension during intermittent feeding. Attached image description:

[0018] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0019] Figure 2 This is a schematic cross-sectional view of the main body of the present invention;

[0020] Figure 3 For the present invention Figure 2 A magnified view of a section at point A in the middle;

[0021] Figure 4 This is a cross-sectional view of the air shaft of the present invention;

[0022] Figure 5 For the present invention Figure 4 A magnified view of a section at point B in the middle;

[0023] Figure 6 For the present invention Figure 2 A magnified view of a section at point C.

[0024] The components include: mounting frame 1, paper feeder 2, tensioning component 3, pull head 4, tension roller 5, swing arm 6, paper feed roller 7, air shaft 8, lifting arm 9, lifting component 10, connecting rod 11, gear 12, correction device 13, second paper feed roller 14, floating roller 15, slide block 16, pull-back roller 17, slider 18, slot 19, guide slot 20, air bar 21, positioning component 22, pressure roller 23, pressure sensor 24, electrical converter 25, electrostatic bar 26, electrostatic needle 27, positioning hole 28, pressure groove 29, pressure block 30, positioning rod 31, sealing plate 32, and second cylinder 33. Detailed Implementation

[0025] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0026] Example: Reference Figures 1-6An intermittent paper feeder includes: a mounting frame 1, a paper feeder 2, a tension member 3, a pull head 4, a displacement sensor, and a controller. The paper feeder 2 is rotatably connected to the end of the mounting frame 1. Two tension members 3 and a pull head 4 are mounted on the inner wall of the mounting frame 1. The pull head 4 is located between the two tension members 3. A cylinder output end is hinged to the side of each tension member 3. The cylinder output end is equipped with a displacement sensor. The cylinder is connected to the inner wall of the mounting frame 1. The paper feeder 2, the pull head 4, and the displacement sensor are connected to the controller.

[0027] The principles and beneficial effects of the above scheme are as follows:

[0028] After the printing paper is placed into the device, the controller starts the paper feeding component 2, tension component 3, and pull head 4. The printing paper is pressed by the pull head 4 to prevent it from shifting during transport within the device, thus improving printing quality. The paper feeding component 2 feeds the printing paper to the tension component 3. Due to the tension at the end of the printing paper, the paper transmits this tension to the tension component 3. The displacement sensor in the tension component 3 monitors the displacement of the tension component 3 and adjusts the paper feeding speed of the paper feeding component 2 to maintain a constant tension on the printing paper within the device. This prevents the printing paper from being damaged due to insufficient rotation speed of the paper feeding component 2 when the end of the printing paper is suddenly subjected to tension during intermittent transport. The presence of a tension component 3 on each side of the pull head 4 enhances the device's buffering effect against the tension on the printing paper.

[0029] The tension component 3 includes: a tension roller 5, a swing arm 6, and a paper feed roller 7. A tension roller 5 is provided on one side of the pull head 4. A swing arm 6 is rotatably connected to each end of the tension roller 5. The top of each swing arm 6 is rotatably connected to the rotating shaft of the inner wall of the mounting frame 1. The side wall of the swing arm 6 is hinged to the output end of the cylinder. A paper feed roller 7 is rotatably connected to the inner wall of the mounting frame 1 and is located below the tension roller 5.

[0030] The principles and beneficial effects of the above scheme are as follows:

[0031] During the conveying process, the printing paper is guided by the tension roller 5 and the paper feed roller 7 on the swing arm 6. The paper feed roller 7 is located below the tension roller 5, which increases the stroke of the printing paper within the device and prevents the entire printing paper from being suddenly subjected to force, causing localized damage. The top of the swing arm 6 is rotatably connected to the inner wall of the mounting frame 1, and the side wall of the swing arm 6 is hinged to the output end of the cylinder. After the printing paper is subjected to tension, the printing paper transmits the tension to the tension roller 5, and the tension roller 5 transmits it to the swing arm 6. The swing arm 6 swings with its top as the center, and the left and right swing of the swing arm 6 is converted into the extension and retraction of the cylinder. The extension and retraction of the cylinder provides a buffer for the printing paper. The extension and retraction of the cylinder output end is monitored by a displacement sensor, which facilitates the timely output of its movement signal to the controller. The controller controls the rotation speed of the paper feeding component 2 through the movement signal of the cylinder output end to ensure a constant conveying speed of the printing paper.

[0032] The paper feeding component 2 includes an air shaft 8, a lifting arm 9, and a lifting element 10. Two lifting arms 9 are connected to the second rotating shaft on the inner wall of the mounting frame 1. The lifting element 10 is connected to one end of the second rotating shaft that extends out of the side wall of the mounting frame 1. Each lifting arm 9 has an arc-shaped groove at its top end, and the mounting frame 1 has a second arc-shaped groove at its end. The arc-shaped groove and the second arc-shaped groove are fitted to the side wall of the air shaft 8 for rotational connection.

[0033] The principles and beneficial effects of the above scheme are as follows:

[0034] A printing paper roll is mounted on the air shaft 8. After the printing paper roll is mounted, the side walls at both ends of the air shaft 8 are respectively attached to the arc-shaped grooves at the top of the two lifting arms 9. The lifting component 10 is activated, and the output end of the lifting component 10 is connected to the second rotating shaft. The second rotating shaft is connected to the bottom end of the two lifting arms 9, causing the lifting arms 9 to rotate with their bottom ends as the center. After the top of the lifting arm 9 rises a certain distance, the side walls at both ends of the air shaft 8 are attached to the second arc-shaped groove. The two pairs of arc-shaped grooves cooperate with the second arc-shaped groove, so that the two ends of the air shaft 8 are rotatably connected to the end of the mounting frame 1. By setting the lifting component 10 to drive the lifting arms 9 to rotate, the space of the device is fully utilized. At the same time, the rotation of the lifting arms 9 drives the air shaft 8 to rise or fall, simplifying the structural design. The arc-shaped groove and the second arc-shaped groove form a circular groove, which is rotatably connected to the end of the air shaft 8, making it easy to disassemble and install the air shaft 8, and reducing the difficulty of device maintenance in case of failure.

[0035] The lifting component 10 includes: a connecting rod 11, one end of the second rotating shaft extending out of the side wall of the mounting frame 1 and connected to the end of the connecting rod 11, the side wall of the connecting rod 11 being hinged to the output end of the second cylinder 33, and the second cylinder 33 being hinged to the side wall of the mounting frame 1.

[0036] The principles and beneficial effects of the above scheme are as follows:

[0037] When the air shaft 8 needs to be lifted, the second cylinder 33 is activated, the output end of the second cylinder 33 extends, the bottom end of the connecting rod 11 rotates counterclockwise, and the top end of the connecting rod 11 drives the second rotating shaft to rotate counterclockwise; when the air shaft 8 needs to be lowered, the second cylinder 33 is activated, the output end of the second cylinder 33 shortens, the bottom end of the connecting rod 11 rotates clockwise, and the top end of the connecting rod 11 drives the second rotating shaft to rotate clockwise, thus improving the movement efficiency of the device; the second cylinder 33 is hinged to the side wall of the mounting frame 1 to prevent the lifting component 10 from jamming during lifting movements, thus improving the rationality of the device; when the air shaft 8 is conveying printing paper, the extension of the output end of the second cylinder 33 locks the lifting arm 9 to the end of the mounting frame 1, preventing the air shaft 8 from falling off, thus improving the safety of the device.

[0038] The gear 12 at the end of the air shaft 8 meshes with the second gear, which is connected to the output end of the motor. The motor is mounted on the side wall of the mounting bracket 1.

[0039] The principles and beneficial effects of the above scheme are as follows:

[0040] After the air shaft 8 is lifted into position by the lifting arm 9, the gear 12 at the end of the air shaft 8 meshes with the second gear. The controller starts the motor output to rotate forward, which drives the gear 12 to rotate forward, and the gear 12 drives the air shaft 8 to rotate forward. When the displacement sensor detects the extension and retraction of the cylinder output, the displacement sensor transmits the displacement signal of the cylinder output to the controller. The controller controls the speed of the motor and controls the speed of the air shaft 8 in a timely manner to maintain a constant printing paper feeding speed and prevent the printing paper from tearing or piling up.

[0041] A guide device 13 is provided between the air shaft 8 and the adjacent cylinder. The guide device 13 is connected to the inner wall of the mounting frame 1. Two second paper feed rollers 14 are provided below the guide device 13. Each second paper feed roller 14 is rotatably connected between the two inner walls of the mounting frame 1.

[0042] The principles and beneficial effects of the above scheme are as follows:

[0043] This device uses a BC-JP800 web guide 13, which is located between the air shaft 8 and the adjacent cylinder. During the paper feeding process, the web guide 13 controls the direction of paper movement to prevent it from deviating and causing a decrease in the printing effect.

[0044] A third cylinder is provided on the other side of the pull head 4. The third cylinder is connected to the inner wall of the mounting frame 1. A floating roller 15 is provided between the third cylinder and the mounting frame 1. The two ends of the floating roller 15 are respectively rotatably connected to a slide block 16. Each slide block 16 is slidably connected to an inner wall of the mounting frame 1. A photoelectric sensor is provided on the slide block 16. The photoelectric sensor and the photoelectric sensor module on the inner wall of the mounting frame 1 sense each other. Both the photoelectric sensor and the photoelectric sensor module are connected to the controller. The bottom end of the slide block 16 is connected to the inner wall of the mounting frame 1 through a return spring.

[0045] The principles and beneficial effects of the above scheme are as follows:

[0046] The floating roller 15 is rotatably connected to a slide block 16 at both ends. Each slide block 16 is slidably connected to the inner wall of the mounting frame 1. The bottom end of the slide block 16 is connected to the inner wall of the mounting frame 1 through a return spring, which provides a buffer for the intermittent feeding of printing paper and prevents the printing paper from cracking due to sudden force.

[0047] A pull roller 17 is provided between the floating roller 15 and the mounting frame 1. The two ends of the pull roller 17 are rotatably connected to a slider 18. Each slider 18 is slidably connected to an inner wall of the mounting frame 1. The slider 18 is connected to the synchronous belt of the synchronous pulley mechanism, which is located on the inner wall of the mounting frame 1.

[0048] The principles and beneficial effects of the above scheme are as follows:

[0049] The slide block 16 is equipped with a photoelectric sensor, which senses each other with the photoelectric sensor module on the inner wall of the mounting bracket 1. Both the photoelectric sensor and the photoelectric sensor module are connected to the controller. After the photoelectric sensor module detects that the photoelectric sensor is sliding relative to the photoelectric sensor, the photoelectric sensor transmits a signal to the controller. The controller controls the synchronous belt pulley mechanism to move up or down. The synchronous belt drives the slider 18 to move down or up, which timely compensates for the tension of the paper and reduces the error generated when the paper moves up and down.

[0050] An electrostatic bar 26 is installed between the two inner walls of the mounting frame 1. One end of the electrostatic bar 26 that extends out of the side wall of the mounting frame 1 is connected to a switch. One side of the switch is connected to a high-voltage power supply, and the other side of the switch is connected to a controller. An electrostatic needle 27 is installed on the side wall of the electrostatic bar 26. The output end of the electrostatic needle 27 is perpendicular to the tangent between the side wall of the pull head 4 and the side wall of a paper roller 7.

[0051] The principles and beneficial effects of the above scheme are as follows:

[0052] When the printing paper is conveyed, it generates a large amount of static electricity due to the conveying and friction of the device. The controller activates the switch, which connects the high-voltage power supply to the static bar 26. The static bar 26 transmits current to the static needle 27. The output end of the static needle 27 generates a corona discharge that ionizes the air into positive and negative ions. These positive and negative ions are blown onto the surface of the printing paper by the airflow to neutralize the static electricity and prevent the printing paper from adsorbing onto the device after carrying static electricity, which would lead to a decrease in printing quality. At the same time, it also prevents static electricity from damaging the electrical components of the device.

[0053] The air shaft 8 includes: a slot 19, a guide groove 20, an air bar 21, and a positioning element 22. The side wall of the air shaft 8 has multiple slots 19, and the bottom end of the slot 19 has a through groove. The inner wall of the air shaft 8 is connected to one end of the guide groove 20. The guide groove 20 and the through groove are concentrically arranged. The air bar 21 is slidably connected in the through groove. The positioning element 22 is installed in the air bar 21. The guide arc at the bottom end of the air bar 21 is slidably sealed with the guide groove 20. The top surface of the guide arc is connected to the inner wall of the air shaft 8 through multiple compression springs. A one-way valve is installed in the air inlet at the end of the air shaft 8.

[0054] The principles and beneficial effects of the above scheme are as follows:

[0055] After the printing paper roll is mounted on the air shaft 8, the air shaft 8 is inflated through the air inlet. A one-way valve is installed in the air inlet to prevent air leakage after inflation. As the air pressure inside the air shaft 8 increases, the guide arc at the bottom of the air expansion bar 21 slides and seals with the guide groove 20. Affected by the increased air pressure, the guide arc moves upward relative to the guide groove 20. Multiple compression springs between the top surface of the guide arc and the inner wall of the air shaft 8 are compressed. After the top of the air expansion bar 21 extends out and contacts the inner wall of the printing paper roll, inflation ends. By setting the air expansion bar 21 to slide, it can be ensured that multiple air expansion bars 21 move synchronously during inflation, preventing the axis of the printing paper roll from not coinciding with the axis of the air shaft 8 after the printing paper roll is installed due to different extension lengths of one or more air expansion bars 21, which would cause the air shaft 8 to vibrate when rotating. By setting the guide arc at the bottom of the air expansion bar 21 to slide and seal with the guide groove 20, the bottom of the guide arc can rise or fall fully by increasing or decreasing the air pressure, improving the corresponding effect of the device. At the same time, the guide groove 20 can prevent the upper and lower surfaces of the guide arc from being subjected to air pressure at the same time, which would cause jamming and improve the rationality of the device. After the printing paper roll finishes conveying, the one-way valve of the air inlet is opened to exhaust the air, the air pressure of the air expansion shaft 8 decreases, and the air expansion bar 21 is reset under the action of the compression spring, preparing for the installation of the next printing paper roll. By setting the two ends of the compression spring to connect with the inner wall of the air expansion shaft 8 and the top surface of the guide arc, the traditional rubber material air expansion shaft is replaced, avoiding the deformation of the rubber material after being heated, which would prevent it from effectively fixing the printing paper roll, thus improving the service life of the device and the working efficiency.

[0056] The positioning component 22 includes: positioning holes 28, pressure grooves 29, pressure blocks 30, and positioning rods 31. Multiple positioning holes 28 are formed on the bottom surface of the guide arc. Each positioning hole 28 has a first through hole on its top wall. A positioning rod 31 is slidably connected within the first through hole. The top end of the positioning rod 31 extends beyond the top surface of the air expansion strip 21. A sealing disc 32 at the bottom end of the positioning rod 31 slidably seals with the positioning hole 28. The top surface of the sealing disc 32 is connected to the top wall of the positioning hole 28 via a second return spring. Multiple pressure grooves 29 are longitudinally formed on each side wall of the air expansion strip 21. The bottom wall of the pressure groove 29 is connected to the second through hole. The second through hole is connected to the positioning hole 28 and slidably connected to the pressure block 30. The top surface of the mounting ring at the end of the pressure block 30 contacts and engages with the side wall of the slot 19. The side wall of the mounting ring contacts and engages with the bottom wall of the slot 19. The bottom surface of the mounting ring is connected to the bottom wall of the pressure groove 29 via a third return spring.

[0057] The air shaft 8 is equipped with a pressure relief valve at its end.

[0058] The principles and beneficial effects of the above scheme are as follows:

[0059] When the air shaft 8 is inflated through the air inlet at its end, the air expansion bar 21 extends outward relative to the air shaft 8. When the top of the positioning rod 31 at the top of the air expansion bar 21 contacts the inner wall of the printing paper roll, the positioning rod 31 moves downward relative to the air expansion bar 21. When the air expansion bar 21 contacts the inner wall of the printing paper roll, the second return spring is stretched, and the sealing disc 32 at the bottom of the positioning rod 31 is pressed out from the positioning hole 28. The sealing disc 32 releases the seal on the positioning hole 28, and the positioning... With hole 28 open, air pressure is applied to the bottom end of the slidingly connected pressure block 30 in the second through hole. The pressure block 30 causes the mounting ring to extend out of the pressure groove 29 on the side wall of the air expansion strip 21. The top surfaces of multiple mounting rings contact and engage with the side wall of the slot 19, and the side wall of one mounting ring contacts and engages with the bottom wall of the slot 19. The top end of the positioning rod 31 extends out to the top surface of the air expansion strip 21, and the sealing disc 32 at the bottom end of the positioning rod 31 slides and seals with the positioning hole 28 to prevent the air expansion strip 21 from contacting the printing plate. Before contact with the inner wall of the paper roll, the device stops working. Simultaneously, by setting the mounting ring on the top surface of the pressure block 30 to contact and engage with the inner wall of the slot 19, the movement of the air expansion strip 21 can be stopped in time, preventing the inner wall of the printing paper roll from being squeezed due to over-inflation, thus avoiding paper deformation. A pressure relief valve is installed at the end of the air expansion shaft 8 to prevent over-inflation, further improving the safety of the device and the protection of the printing paper roll. The positioning component 22 can accurately stop the air expansion strip 21 after positioning it against the inner wall of the printing paper roll according to the different inner diameters of the printing paper roll, improving the applicability of the device. The pressure block 30 ensures the precise positioning of the air expansion strip 21 relative to the air expansion shaft 8, preventing the printing paper roll from becoming eccentric during rotation of the air expansion shaft 8. The contact and engagement between the bottom wall of the slot 19 and the side wall of the mounting ring further ensures the positioning effect of the air expansion strip 21 and significantly improves the fit between the parts.

[0060] An intermittent paper feeder tension control system, applicable to any of the intermittent paper feeders described above, includes: a pressure roller 23, a pressure sensor 24, and an electrical converter 25. The pressure roller 23 is provided between the third cylinder and the floating roller 15. The pressure sensor 24 is provided on the pressure roller 23 and is connected to a controller. Both ends of the pressure roller 23 are rotatably connected to a mounting block. The bottom end of each mounting block is connected to the inner wall of the mounting frame 1 through a spring. One side of the electrical converter 25 on the inner wall of the mounting frame 1 is connected to the cylinder, and the other side of the electrical converter 25 is connected to the controller.

[0061] The principles and beneficial effects of the above scheme are as follows:

[0062] The system detects the tension data of the printing paper through the pressure sensor 24 and transmits it to the electrical converter 25. The electrical converter 25 controls the air supply pressure of the cylinder to adjust the force on the printing paper, so that the printing paper maintains tension balance under constant speed and prevents the printing paper from breaking.

[0063] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. Other modifications can be easily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. An intermittent paper feeder, characterized in that, include: Mounting frame (1), the end of which is rotatably connected to a paper feeding component (2), and the inner wall of the mounting frame (1) is equipped with two tension components (3) and a pull head (4). The pull head (4) is located between the two tension components (3). Each tension component (3) has a cylinder output end hinged to its side. The cylinder output end is equipped with a displacement sensor. The cylinder is connected to the inner wall of the mounting frame (1). The tension component (3) includes: a tension roller (5), a tension roller (5) is provided on one side of the pull head (4), and a swing arm (6) is rotatably connected to each end of the tension roller (5). The top of each swing arm (6) is rotatably connected to the inner wall of the mounting frame (1), the side wall of the swing arm (6) is hinged to the output end of the cylinder, and a paper feed roller (7) is rotatably connected to the inner wall of the mounting frame (1). The paper feed roller (7) is located below the tension roller (5). The paper feeding component (2) includes: lifting arm (9), two lifting arms (9) are connected to the second rotating shaft on the inner wall of the mounting frame (1), and a lifting component (10) is connected to one end of the second rotating shaft that extends out to the side wall of the mounting frame (1). Each lifting arm (9) has an arc-shaped groove at its top end, and the mounting frame (1) has two second arc-shaped grooves at its end. The arc-shaped grooves and the second arc-shaped grooves are matched and rotatedly connected to the side wall of the air shaft (8). The gear (12) at the end of the air shaft (8) meshes with the second gear, the second gear is connected to the output end of the motor, and the motor is mounted on the side wall of the mounting bracket (1); A guide device (13) is provided between the air shaft (8) and the adjacent cylinder. The guide device (13) is connected to the inner wall of the mounting frame (1). Two second paper feed rollers (14) are provided below the guide device (13). Each second paper feed roller (14) is rotatably connected between the two inner walls of the mounting frame (1). The other side of the pull head (4) is provided with a third cylinder. The third cylinder is connected to the inner wall of the mounting frame (1). A floating roller (15) is provided between the third cylinder and the mounting frame (1). The two ends of the floating roller (15) are rotatably connected to a slide (16). Each slide (16) is slidably connected to an inner wall of the mounting frame (1). A photoelectric sensor is provided on the slide (16). The bottom end of the slide (16) is connected to the inner wall of the mounting frame (1) through a return spring. The air shaft (8) includes: a slot (19), the side wall of the air shaft (8) has multiple slots (19), the bottom end of the slot (19) has a through groove, the inner wall of the air shaft (8) is connected to one end of the guide groove (20), the guide groove (20) and the through groove are concentrically arranged, an air strip (21) is slidably connected in the through groove, a positioning element (22) is installed in the air strip (21), the guide arc at the bottom end of the air strip (21) is slidably sealed with the guide groove (20), the top surface of the guide arc is connected to the inner wall of the air shaft (8) through multiple compression springs, and a one-way valve is installed in the air inlet at the end of the air shaft (8); An electrostatic bar (26) is installed between the two inner walls of the mounting frame (1). One end of the electrostatic bar (26) that extends out to the outside of the side wall of the mounting frame (1) is connected to a switch. One side of the switch is connected to a high-voltage power supply, and the other side of the switch is connected to a controller. An electrostatic needle (27) is installed on the side wall of the electrostatic bar (26). The output end of the electrostatic needle (27) is perpendicular to the tangent between the side wall of the pull head (4) and the side wall of the paper roller (7). The positioning component (22) includes: positioning holes (28), pressure grooves (29), pressure blocks (30), and positioning rods (31). Multiple positioning holes (28) are opened on the bottom surface of the guide arc. Each positioning hole (28) has a first through hole on its top wall. A positioning rod (31) is slidably connected inside the first through hole. The top end of the positioning rod (31) extends beyond the top surface of the air expansion strip (21). The sealing disc (32) at the bottom end of the positioning rod (31) slidably seals with the positioning hole (28). The top surface of the sealing disc (32) passes through… The second reset spring is connected to the top wall of the positioning hole (28). The air expansion strip (21) has multiple pressure grooves (29) longitudinally opened on each side wall. The bottom wall of the pressure groove (29) is connected to the second through hole. The second through hole is connected to the positioning hole (28). The second through hole is slidably connected to the pressure block (30). The top surface of the mounting ring at the end of the pressure block (30) contacts and cooperates with the side wall of the slot (19). The side wall of the mounting ring contacts and cooperates with the bottom wall of the slot (19). The bottom surface of the mounting ring is connected to the bottom wall of the pressure groove (29) through the third reset spring. The air shaft (8) is equipped with a pressure relief valve at its end.

2. The intermittent paper feeder according to claim 1, characterized in that, The lifting component (10) includes: a connecting rod (11), one end of the second rotating shaft extending out to the side wall of the mounting frame (1) and connected to the end of the connecting rod (11), the side wall of the connecting rod (11) being hinged to the output end of the second cylinder (33), and the second cylinder being rotatably connected to the side wall of the mounting frame (1).

3. The intermittent paper feeder according to claim 1, characterized in that, A pull roller (17) is provided between the floating roller (15) and the mounting frame (1). The two ends of the pull roller (17) are rotatably connected to a slider (18). Each slider (18) is slidably connected to an inner wall of the mounting frame (1). The slider (18) is connected to the synchronous belt of the synchronous pulley mechanism. The synchronous pulley mechanism is set on the inner wall of the mounting frame (1).

4. A tension control system for an intermittent paper feeder, applicable to an intermittent paper feeder as described in any one of claims 1-3, characterized in that, include: Pressure roller (23) is provided between the third cylinder and the floating roller (15). Pressure sensor (24) is provided on the pressure roller (23). The two ends of the pressure roller (23) are rotatably connected to a mounting block. The bottom end of each mounting block is connected to the inner wall of the mounting frame (1) through a spring. The electrical converter (25) on the inner wall of the mounting frame (1) is connected to the cylinder on one side.

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