A paper centering structure for single-blade double-rotation synchronous slitting

Abstract

The present invention discloses a paper feeding centering structure for single-blade double-rotation synchronous slitting, comprising two sets of brackets arranged in parallel, two groups of support arms being adjustably arranged in the gap between the two sets of the brackets, the two groups of support arms being distributed on both sides of the gap, each group of the support arms comprising two, a support roller being arranged between the two support arms of each group, the support roller being arranged to penetrate through a paper roll; end shafts being arranged at both ends of the support roller, the end shaft being adjustably arranged to penetrate through the top of the support arm; a pressure plate being arranged between the support arm and the support roller, and the top of the pressure plate being arranged to be an arc structure, therefore, the structural characteristics of the pressure plate can be utilized, and under the action of the pressure plate, in the process of the support roller descending and being supported on the support arm, under the action of the pressure plate, the support roller and the paper roll are controlled to be in a centering state, thereby providing support for realizing centering feeding of paper, and changing the current situation where it is inconvenient to adjust the state of the paper roll when replacing the paper roll.

Description

Technical Field

[0001] The invention relates to the technical field of paper centering, in particular to a paper centering structure for single-blade double-rotation synchronous cutting. Background Art

[0002] High-precision single-blade dual-rotation fully synchronous slitting equipment is mainly used for precision slitting of paper. It can slit the rewound paper roll into paper with specifications within the width, cutting length deviation less than 0.15mm and squareness less than 0.3mm according to the needs of the downstream packaging or printing market.

[0003] The purpose of paper slitting is to cut large-sized paper into a predetermined width or length to obtain a smaller-sized paper that meets the requirements. If the paper is not centered, the cutting position will deviate from the preset cutting line during slitting. For example, when slitting paper with a width of A4 paper (210mm), if the paper is not centered, the slitting paper may be wide on one side and narrow on the other side, which cannot meet the strict dimensional tolerance requirements of A4 paper.

[0004] During the slitting process of misaligned paper, the contact angle between the cutter and the edge of the paper may be uneven. This will cause burrs and unevenness on the edge of the paper after slitting. However, after the paper is centered, the cutter can cut into the paper vertically and evenly, thus obtaining a smooth and neat edge and improving the edge quality of the paper.

[0005] If the paper deviates from the preset cutting line, it may deviate to one side during the conveying process of the slitting equipment, and it is easy to get stuck between the conveying rollers, guide rollers or slitting tools of the equipment. This paper jam phenomenon will not only interrupt the production process, but also damage the equipment components. For example, excessive deviation of the paper may cause uneven force on the conveying rollers, deform the roller shaft, or crack the blade of the slitting tool.

[0006] Whether it is a high-precision single-blade dual-rotation fully synchronous slitting device or other types of slitting equipment, when it is working to slit the paper roll, it requires the cooperation of guide rollers, transmission rollers and other devices to realize the centering of the paper. Although the above-mentioned processing method can realize the centering of the paper, when replacing the paper roll, because there is no corresponding centering mechanism at the paper roll holder, if the paper roll is not accurately placed in the predetermined position, or the placement angle is deviated, even if the equipment has an automatic centering function, it may exceed its correction range and cannot achieve a good centering effect. In addition, the surface of guide rollers, transmission rollers and other devices is smooth, and their main function is to limit the movement of the centered paper along the predetermined trajectory, which means that when the paper is offset, it cannot be corrected. Summary of the invention

[0007] The object of the present invention is to provide a single-blade dual-rotation synchronous slitting paper centering structure, aiming to improve the problem that it is inconvenient to adjust the state of the paper roll to achieve paper centering at the paper roll support of the paper slitting equipment.

[0008] The present invention is implemented as follows: a single-blade double-rotation synchronous slitting paper centering structure includes two sets of parallel brackets, two groups of support arms are adjustably arranged in the gap between the two sets of brackets, the two groups of support arms are distributed on both sides of the gap, each group of support arms includes two arms, a support roller is arranged between the two support arms of each group, and the support roller passes through the paper roll; end shafts are arranged at both ends of the support roller, and the end shafts are adjustable to pass through the top of the support arm; a pressure plate is arranged in the gap between the support roller and the support arm, and the pressure plate can force the support roller to move; a limiting rod is arranged on the side of each group of support arms, and the limiting rod contacts the paper roll and pulls the two edges of the paper away from each other.

[0009] Preferably, the pressure plate includes a half-disc and an arc-shaped top plate, the two arc-shaped top plates are fixedly arranged above the half-disc to form a U-shaped structure, a connecting rod and a threaded rod are fixedly arranged on the side of the half-disc, the ends of the connecting rod and the threaded rod are inserted into the through-holes of the support arm, and a nut is threadedly sleeved on the threaded rod.

[0010] Preferably, a first arc-shaped groove is provided on the end face of the half-disc adjacent to the support roller, the cross-section of the first arc-shaped groove is set to a C-shaped structure, and the central angle is greater than 180°, and the ends of the first arc-shaped groove are connected to each other with entry and exit grooves; a plurality of first balls are provided at the first arc-shaped groove, and the first balls are in contact with the end face of the support roller.

[0011] Preferably, a mounting groove is provided at the top of the support arm, an arc groove is provided at the mounting groove, a plurality of second balls are provided in the arc groove, a limiting arc plate is hingedly provided at the mounting groove, the end shaft passes through the space formed by the arc groove and the limiting arc plate, and contacts with the second balls.

[0012] Preferably, a first snap groove and a second snap groove are respectively provided on the end walls of the mounting groove and the limiting arc plate, a first snap plate is magnetically provided at the first snap groove, a second snap plate is fixedly provided at the end of the first snap plate, and the second snap plate is installed in the second snap groove.

[0013] Preferably, a support plate is provided on the side of the support arm away from the pressure plate, the lower side of the side of the support plate is connected to the support arm through a connecting plate, and a driving shaft is provided through the middle part, one end of the driving shaft is sleeved with a second sprocket, and the other end is fixedly provided with a square plate; a slot is provided on the end shaft, the bottom of the slot is set to be an opening, and can be sleeved on the square plate.

[0014] Preferably, the bracket includes a bottom frame, on which are arranged a plurality of bearing seats, and the support shaft of the support arm passes through the bearing seats; a motor is arranged on the side of the bottom frame, on the output shaft of the motor are arranged a plurality of third sprockets, on the support arm is arranged a fourth sprocket, and between the third sprocket and the fourth sprocket an adjustable first sprocket is arranged, and the first sprocket, the second sprocket, the third sprocket, and the fourth sprocket are connected by a chain.

[0015] Preferably, the central axis of the first sprocket is connected through a bearing and passes through a bottom rod, a counterweight column is arranged below the bottom rod, and a plug-in plate on the top of the counterweight column is connected by bolts and inserted into the bottom rod; the bottom rod passes through a through hole arrangement of the bearing seat and the bottom frame.

[0016] Preferably, two spiral columns are symmetrically arranged on the limiting rod, and the spiral columns are in contact with the paper; the end of the limiting rod is inserted into the end plate through a bearing connection, and a slide plate is arranged on the side of the two end plates away from each other, and the slide plate is penetrated through the bar hole of the support arm; a spring is arranged on the connecting column of the slide plate protruding from the bar hole, and the other end of the spring is connected to the support arm.

[0017] Preferably, the bracket also includes two driving arms, which are connected to the support arm through a support shaft; a vertical plate is penetrated at each driving arm, a connecting pipe is adjustably provided on the vertical plate, a brake shaft is penetrated at the connecting pipe, and the end of the brake shaft is inserted into the sliding hole of the driving arm; a horizontal plate is provided at the bottom between the two vertical plates, a telescopic cylinder is adjustably provided on the horizontal plate, and the telescopic end of the telescopic cylinder can contact the side column of the driving arm.

[0018] The beneficial effects brought by the present invention are:

[0019] 1. The present invention provides a pressure plate between the support arm and the support roller, and the top of the pressure plate is configured as an arc-shaped structure. Therefore, the structural characteristics of the pressure plate can be utilized, and under the action of the pressure plate, when the support roller is lowered and supported on the support arm, the support roller and the paper roll are controlled to be in a centered state under the action of the pressure plate, so as to provide support for realizing centered loading of paper and change the current situation that it is inconvenient to adjust the state of the paper roll when replacing the paper roll.

[0020] 2. The present invention is provided with a limiting rod, and spiral columns are symmetrically arranged on the limiting rod. At the same time, the spiral columns are in contact with the paper, and the two edges of the paper can be pulled away from each other under the action of the spiral columns to prevent the paper from deviating from the preset route, or to straighten the paper when it deviates.

[0021] 3. The present invention is provided with a distance meter, which can monitor the diameter change of the paper roll in real time, so as to remind the staff in advance to prepare for the paper roll replacement; at the same time, the distance meter can be connected to the same host computer as the motor, and the host computer can adjust the working state of the motor according to the information of the distance meter, so as to provide support for the continuous feeding of paper. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention, so that other features, purposes and characteristics of the present invention become more obvious. The drawings and descriptions of the exemplary embodiments of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 is a schematic diagram of the present invention and a paper roll;

[0025] Figure 3 It is a schematic structural diagram of the support arm and the support roller of the present invention;

[0026] Figure 4 It is a schematic diagram of the end structure of the support arm of the present invention;

[0027] Figure 5 It is a structural schematic diagram of the pressure plate of the present invention;

[0028] Figure 6 This is a schematic diagram of the partial structure of the support arm and support roller of the present invention.

[0029] Figure 7 It is a structural schematic diagram of the support plate of the present invention;

[0030] Figure 8 is a first structural schematic diagram of the bracket of the present invention;

[0031] Fig. 9 is a schematic structural diagram of the first sprocket of the present invention;

[0032] Fig.10 It is a schematic structural diagram of the limiting rod, the supporting roller and the supporting arm of the present invention;

[0033] Fig.11 It is a structural schematic diagram of the limiting rod of the present invention;

[0034] Fig.12 is a second structural schematic diagram of the bracket of the present invention;

[0035] Fig.13 It is a schematic diagram of the structure of the horizontal plate, the vertical plate and the driving arm of the present invention;

[0036] Fig.14 It is a schematic diagram of the structure of the horizontal plate and the vertical plate of the present invention;

[0037] Fig.15 It is a structural schematic diagram of the laser rangefinder and the support arm of the present invention;

[0038] Fig.16 It is a structural schematic diagram of the mounting plate of the present invention;

[0039] Fig.17 It is a schematic diagram of the cooperation between the present invention and the slitting equipment.

[0040] In the figure: bracket 1; bottom frame 11; motor 12; bearing seat 13; first sprocket 14; bottom rod 15; plug-in board 16; counterweight column 17; through hole 18; support arm 2; bar hole 21; pressure plate 22; half plate 221; arc top plate 222; first arc groove 223; first ball 224; connecting rod 225; threaded rod 226; nut 227; mounting groove 23; arc groove 231; second ball 232; first snap groove 24; first snap plate 25; second snap plate 26; perforation 27; limiting arc plate 28; second snap groove 281; guide rail 29; sliding groove 29 1; support roller 3; end shaft 31; slot 32; support plate 33; drive shaft 34; second sprocket 35; connecting plate 36; square plate 37; limit rod 4; spring 41; end plate 42; slide plate 43; connecting column 44; spiral column 45; adjustment mechanism 5; telescopic cylinder 51; drive arm 52; support shaft 53; cross plate 54; socket 541; vertical plate 55; slot 551; connecting tube 552; card plate 553; brake shaft 554; sleeve plate 56; convex shaft 561; latch 562; laser rangefinder 6; mounting plate 61; arc groove 62; clamping plate 63; convex column 64; sliding block 65. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0043] Example 1

[0044] In order to place the paper roll in the center and facilitate the paper loading in the center, the present embodiment provides a paper loading structure for the slitting device. The structure is installed at the end of the slitting device, and the paper roll is supported by the structure, and the paper roll is placed in the center, so that the paper loading in the center is realized.

[0045] like Figure 1 , Figure 2 , Figure 3As shown, specifically, the structure includes a bracket 1, a support arm 2, a support roller 3, etc. There are four support arms 2, and the four support arms 2 are divided into two groups. The bracket 1 is set into two sets, and the two sets of brackets 1 are arranged in parallel. The two groups of support arms 2 are arranged on both sides of the gap between the two brackets 1, and are respectively installed at the ends of the brackets 1 to achieve stable installation of the support arms 2. There are two support rollers 3, and the two support rollers 3 are matched with the two groups of support arms 2 one by one, and the support rollers 3 are arranged between the two support arms 2 in the same group, and the support rollers 3 are arranged through the paper roll.

[0046] like Figure 4 As shown, in order to facilitate the disassembly and assembly of the support roller 3, a mounting groove 23 is provided at the top of the support arm 2, an arc groove 231 is provided at the mounting groove 23, and a limiting arc plate 28 is hingedly provided at the mounting groove 23 by a hinge or the like, and the center angle of the limiting arc plate 28 is the same as the center angle of the arc groove 231, so the limiting arc plate 28 and the arc groove 231 form the installation space of the end shaft 31 of the end of the support roller 3, that is, the end shaft 31 is arranged through the space. Then, when it is necessary to replace the paper roll, the limiting arc plate 28 can be controlled to flip after the restriction of the limiting arc plate 28 is released, so that the arc groove 231 is unobstructed, the support roller 3 is removed, and the end shaft 31 of the support roller 3 wrapped with paper is installed at the arc groove 231, and then, the end shaft 31 can be controlled to be stably installed relative to the support arm 2 under the action of the limiting arc plate 28.

[0047] like Figure 3 , Figure 5 As shown, in order to force the support roller 3 to move when the support roller 3 is installed at the arc groove 231 to achieve the centering of the paper roll, a pressure plate 22 is arranged in the gap between the support roller 3 and the support arm 2, and the pressure plate 22 includes a half disk 221 and an arc top plate 222. The two arc top plates 222 are fixedly arranged above the half disk 221 and form a U-shaped structure. The half disk 221 can be adjustably arranged on the support arm 2. Therefore, when the support roller 3 with the paper roll is dropped and installed, the pressure plate 22 can use its structural characteristics to force the support roller 3 to drive the paper roll to move, and then adjust the position of the paper roll to make it centered.

[0048] like Figure 4 , Figure 5As shown, in order to achieve the adjustable setting of the half-disc 221, so as to adjust the position of the pressure plate 22 to achieve the symmetrical placement of the paper roll, a connecting rod 225 and a threaded rod 226 are fixedly arranged on the side of the half-disc 221, and the ends of the connecting rod 225 and the threaded rod 226 are inserted into the through hole 27 of the support arm 2. With the cooperation of the connecting rod 225, the threaded rod 226 and the through hole 27, the half-disc 221 and the support arm 2 can be movably and stably installed. A nut 227 is threadedly sleeved on the threaded rod 226, and the nut 227 is arranged in contact with the side wall of the support arm 2 adjacent to the paper roll. Therefore, the position of the half-disc 221 can be adjusted by rotating the nut 227, so that the pressure plate 22 can adapt to the support roller 3 and paper rolls of different lengths.

[0049] like Figure 5 As shown, in order to reduce the resistance of the relative rotation between the pressure plate 22 and the support roller 3, a first arc-shaped curved groove 223 is provided on the end surface of the half-disk 221 adjacent to the support roller 3, and the minimum central angle of the first arc-shaped curved groove 223 is set to 90°. The cross section of the first arc-shaped curved groove 223 is set to a C-shaped structure, and the central angle is greater than 180°, and a plurality of first balls 224 are provided at the first arc-shaped curved groove 223, and the first balls 224 are provided protruding from the half-disk 221, so that the first balls 224 are in contact with the end surface of the support roller 3, and the resistance between the pressure plate 22 and the support roller 3 can be reduced by the rolling of the balls. In order to install the first balls 224 in the first arc-shaped curved groove 223, an inlet and outlet groove is provided at the end of the first arc-shaped curved groove 223, and the size of the inlet and outlet groove is greater than the size of the first balls 224, so that the first balls 224 can pass through the inlet and outlet groove to realize their disassembly and assembly.

[0050] like Figure 4 As shown, in order to reduce the resistance of the relative rotation between the end shaft 31 and the support arm 2, a second arc-shaped curved groove is provided on the side wall of the arc-shaped groove 231. The second arc-shaped curved groove can be provided with reference to the first arc-shaped curved groove 223, and a plurality of second balls 232 are provided in the second arc-shaped curved groove. The end shaft 31 contacts the second balls 232, so the friction coefficient between the end shaft 31 and the support arm 2 can be reduced under the rolling of the second balls 232. The second arc-shaped curved groove and the second balls 232 can also be provided on the limiting arc plate 28 according to actual needs.

[0051] like Figure 4As shown, in order to stably install the limiting arc plate 28 on the support arm 2 and quickly release the restriction when replacing the paper roll, a first snap groove 24 and a second snap groove 281 are respectively provided on the end wall of the installation groove 23 and the limiting arc plate 28, and a first snap plate 25 is provided on the first snap groove 24. A magnet that attracts each other can be provided at the ends of the first snap plate 25 and the first snap groove 24, or an anti-slip layer can be provided on the contact surface of the first snap plate 25 and the first snap groove 24, so that the first snap plate 25 can be stably installed in the first snap groove 24 and facilitate the pulling of the first snap plate 25 according to the demand. A second snap plate 26 is fixedly provided at the end of the first snap plate 25, and the second snap plate 26 can be installed in the second snap groove 281. When the paper roll needs to be replaced, the staff pulls the first snap plate 25 to drive the second snap plate 26 to move, so that the second snap plate 26 is separated from the second snap groove 281, and the restriction of the limiting arc plate 28 is released, so that the staff can flip the limiting arc plate 28. After replacing the paper roll, the reverse operation can be performed to control the limiting arc plate 28 to be stably installed.

[0052] like Figure 6 , Figure 7 , Figure 8 As shown, in order to simultaneously control the rotation of two support rollers 3 and realize the feeding of paper, a support plate 33 is arranged on the side of the support arm 2 away from the pressure plate 22, and the lower side of the side of the support plate 33 is connected to the support arm 2 through a connecting plate 36, so that the support plate 33 can be stably installed without affecting the disassembly and assembly of the support roller 3. A driving shaft 34 is arranged through the middle of the support plate 33, and a square plate 37 is fixedly arranged at one end of the driving shaft 34, and a slot 32 is arranged on the end shaft 31, so that the square plate 37 can be immersed in the slot 32 during the descending process of the support roller 3, so that the driving shaft 34 can be connected with the support roller 3. In addition, the square plate 37 and the slot 32 are movably connected, which does not affect the movement and centering of the support roller 3. A second sprocket 35 is sleeved on the other end of the driving shaft 34, and the second sprocket 35 can be connected to the motor 12 through a chain, so that the rotation of the support roller 3 can be controlled when the motor 12 is working. In order to control the rotation of two support rollers 3 by one motor 12, at least two third sprockets are required to be provided on the output shaft of the motor 12, and at least two fourth sprockets are also provided on each support arm 2. The fourth sprocket is connected to the third sprocket and the second sprocket 35 by a chain. Then, when the motor 12 is working, the rotation of the two support rollers 3 can be controlled, thereby reducing the number of motors 12 and reducing the assembly cost of the device.

[0053] like Fig.12As shown, in order to be able to lift the paper roll to the corresponding height when replacing the paper roll, the support arm 2 is adjustably arranged on the bracket 1. Specifically, the bracket 1 includes a bottom frame 11, two driving arms 52, etc. A plurality of bearing seats 13 are arranged on the bottom frame 11. The bottom of the two driving arms 52 is fixedly provided with a support shaft 53. The support shaft 53 passes through the corresponding bearing seats 13 and is respectively connected to the support arms 2 of two groups of support arms 2 adjacent to the same bracket 1. Then, by adjusting the state of the driving arm 52, the adjustment of the state of the support arm 2 can be realized.

[0054] As Fig.13 shown, in order to realize the adjustment of the state of the driving arm 52, a vertical plate 55 is penetrated and arranged at each driving arm 52. A cross plate 54 is arranged at the bottom between the two vertical plates 55. A telescopic cylinder 51 is adjustably arranged on the cross plate 54. An arc plate is arranged on the telescopic end of the telescopic cylinder 51. The arc plate can contact the side column of the driving arm 52. Therefore, when the telescopic cylinder 51 works, the driving arm 52 can be controlled to rotate around the axis. The telescopic cylinder 51 can be set as an electric cylinder or a hydraulic cylinder. When it is set as a hydraulic cylinder, a hydraulic pump, a reversing valve, a flow control valve, an oil tank, etc. need to be equipped for it so that it can work normally.

[0055] As Fig.14 shown, in order to stably place the driving arm 52 adjusted to an inclined state, the vertical plate 55 is set as a U-shaped structure, and a plurality of card slots 551 are arranged on the inner side wall. The plurality of card slots 551 are arranged along the height direction of the vertical plate 55. A connecting pipe 552 is arranged in the vertical plate 55. A clamping plate 553 is fixedly arranged on the side of the connecting pipe 552. When the clamping plate 553 is inserted into a certain card slot 551, the stable and adjustable connection between the connecting pipe 552 and the vertical plate 55 can be realized. A braking shaft 554 is penetrated and arranged at the connecting pipe 552. The end of the braking shaft 554 is inserted into the sliding hole of the driving arm 52, so that the driving arm 52 is stably at a certain inclined angle, and further the support arm 2 is stably placed.

[0056] As Fig.13 and Fig.14 shown, in order to be able to realize the adjustment of the telescopic cylinder 51, a plurality of jacks 541 are arranged on the cross plate 54, and a sleeve plate 56 is sleeved. A pin 562 penetrating the sleeve plate 56 is inserted into a certain jack 541 to realize the stable and adjustable installation of the sleeve plate 56. A convex shaft 561 is fixedly arranged on the side of the sleeve plate 56. The sleeve at the bottom of the telescopic cylinder 51 is connected and sleeved on the convex shaft 561 through a bearing, which is convenient for adjusting the inclination angle of the telescopic cylinder 51 according to requirements.

[0057] As Figure 8As shown, when the tilt angle of the support arm 2 is adjustable, the connection of the sprockets can still be achieved, and an adjustable first sprocket 14 is arranged between the third sprocket and the fourth sprocket. The first sprocket 14, the second sprocket 35, the third sprocket, and the fourth sprocket are connected by a chain, and the height of the first sprocket 14 can be adjusted to control the sprocket to always be in a straight state, thereby achieving effective connection between the third sprocket and the fourth sprocket.

[0058] like Fig. 9 , Fig.12 As shown, specifically, the central axis of the first sprocket 14 is connected through a bearing and passes through a bottom rod 15, a counterweight column 17 is arranged below the bottom rod 15, and a plug-in plate 16 on the top of the counterweight column 17 is inserted into the bottom rod 15 by bolts, and the bottom rod 15 passes through a through hole 18 of the bearing seat 14 and the bottom frame 11. When the first sprocket 14 is connected to the chain, the first sprocket 14 can be pulled down under the action of the counterweight column 17, thereby putting the sprocket in a tensioned state.

[0059] Example 2

[0060] like Figure 1 , Fig.10 , Fig.11 As shown, on the basis of Example 1, in order to further realize the centering and feeding of paper, a limiting rod 4 is arranged on the side of each group of support arms 2, and two spiral columns 45 are symmetrically arranged on the limiting rod 4. The spiral columns 45 are in contact with the paper. Therefore, in the process of the paper moving and driving the limiting rod 4 to rotate, the two edges of the paper can be pulled away from each other under the action of the spiral columns 45, so as to avoid that one edge of the paper deviates from the preset route and affects the centering and feeding. In order to enable the limiting rod 4 to adjust its position as the diameter of the paper roll changes, the end of the limiting rod 4 is connected and inserted into the end plate 42 through a bearing, and a slide plate 43 is arranged on the side of the two end plates 42 away from each other. The slide plate 43 is arranged through the bar hole 21 of the support arm 2, so that the limiting rod 4 is stably and movably installed. A spring 41 is arranged on the connecting column 44 of the slide plate 43 protruding from the bar hole 21, and the other end of the spring 41 is connected to the support arm 2. Under the action of the spring 41, the limiting rod 4 can be controlled to move as the diameter of the paper roll changes.

[0061] Example 3

[0062] like Fig.15 , Fig.16As shown, on the basis of embodiment 1 or 2, in order to monitor the diameter change of the paper roll in real time and remind the staff to replace the paper roll in advance, a laser rangefinder 6 is arranged on the side of the paper roll, the laser rangefinder 6 is directly opposite to the paper roll, and the real-time monitoring of the diameter change of the paper roll is realized. In order to stably install the laser rangefinder 6, the laser rangefinder 6 is clamped on the clamping plate 63, and a mounting plate 61 is arranged below the clamping plate 63. The mounting plate 61 is provided with an arc groove 62, and a protrusion 64 is arranged at the bottom of the clamping plate 63. The protrusion 64 is installed in the arc groove 62, and an anti-skid layer is arranged on the contact surface, so that the clamping plate 63 and the mounting plate 61 are adjustable. Therefore, the position of the laser rangefinder 6 can be adjusted according to needs.

[0063] In addition, a bolt is threadedly provided at the end of the mounting plate 61 , and a sliding block 65 is fixedly provided below the end. The sliding block 65 is installed in the sliding groove 291 of the guide rail 29 , and the bottom of the bolt is pressed against the guide rail 29 , while the guide rail 29 is installed on the support arm 2 .

[0064] Of course, the laser rangefinder 6 and the motor 12 can also be connected to the same host computer (at least including a computer host or an industrial control computer), and the connection method has been disclosed, such as the laser rangefinder 6 can be connected to the host computer through serial communication and USB to serial port; the motor needs to be connected to the corresponding motor driver first, and then connected to the host computer by the motor driver, or connected to the host computer through the serial port of the motor driver. The host computer receives the distance information data sent by the laser rangefinder through the communication connection established with the laser rangefinder. Then, the received data is parsed according to the pre-set communication protocol and data format to extract the valid distance value. The host computer generates the corresponding control command and sends the command to the motor driver through the connection channel with the motor, thereby adjusting the working state of the motor, and then it is convenient to adjust the working state of the motor 12 according to the change of the paper roll diameter, which provides convenience for realizing continuous feeding of paper.

[0065] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0066] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A paper centering structure for single-blade double-rotation synchronous slitting, characterized in that: The invention comprises two sets of brackets (1) arranged in parallel, two sets of support arms (2) are adjustably arranged in the gap between the two sets of brackets (1), and the two sets of support arms (2) are distributed on both sides of the gap; each set of support arms (2) comprises two arms, and a support roller (3) is arranged between the two support arms (2) in each set, and the support roller (3) is arranged to pass through the paper roll; both ends of the support roller (3) are provided with end shafts (31), and the end shafts (31) are adjustable to pass through the top of the support arm (2); a pressure plate (22) is arranged in the gap between the support roller (3) and the support arm (2), and the pressure plate (22) can force the support roller (3) to move; a limiting rod (4) is arranged on the side of each set of support arms (2), and the limiting rod (4) is in contact with the paper roll.

2. The paper centering structure for single-blade dual-rotation synchronous slitting according to claim 1 is characterized in that: The pressure plate (22) comprises a half plate (221) and an arc-shaped top plate (222). The two arc-shaped top plates (222) are fixedly arranged above the half plate (221) to form a U-shaped structure. A connecting rod (225) and a threaded rod (226) are fixedly arranged on the side of the half plate (221). The ends of the connecting rod (225) and the threaded rod (226) are inserted into the through holes (27) of the support arm (2), and a nut (227) is threadedly sleeved on the threaded rod (226).

3. The paper centering structure for single-blade dual-rotation synchronous slitting according to claim 2 is characterized in that: A first arc-shaped curved groove (223) is arranged on the end surface of the half disc (221) adjacent to the support roller (3); the cross section of the first arc-shaped curved groove (223) is arranged to be a C-shaped structure, and the central angle of the circle is greater than 180°; and an inlet and outlet groove is arranged at the ends of the first arc-shaped curved groove (223); a plurality of first rolling balls (224) are arranged at the first arc-shaped curved groove (223), and the first rolling balls (224) are in contact with the end surface of the support roller (3).

4. The paper centering structure for single-blade dual-rotation synchronous slitting according to claim 1 is characterized in that: The top of the support arm (2) is provided with a mounting groove (23), the mounting groove (23) is provided with an arc groove (231), a plurality of second balls (232) are provided in the arc groove (231), a limiting arc plate (28) is hingedly provided at the mounting groove (23), the end shaft (31) passes through the space formed by the arc groove (231) and the limiting arc plate (28), and contacts the second balls (232).

5. The paper centering structure for single-blade dual-rotation synchronous slitting according to claim 4 is characterized in that: A first snap groove (24) and a second snap groove (281) are respectively provided on the end walls of the mounting groove (23) and the limiting arc plate (28); a first snap plate (25) is magnetically arranged at the first snap groove (24); a second snap plate (26) is fixedly arranged at the end of the first snap plate (25); and the second snap plate (26) is installed in the second snap groove (281).

6. The paper centering structure for single-blade dual-rotation synchronous slitting according to claim 5 is characterized in that: A support plate (33) is arranged on the side of the support arm (2) away from the pressure plate (22); the lower side of the side of the support plate (33) is connected to the support arm (2) through a connecting plate (36); and a driving shaft (34) is arranged through the middle; one end of the driving shaft (34) is sleeved with a second sprocket (35), and the other end is fixedly provided with a square plate (37); a slot (32) is arranged on the end shaft (31); the bottom of the slot (32) is arranged to be open and can be sleeved on the square plate (37).

7. The paper centering structure for single-blade dual-rotation synchronous slitting according to claim 6 is characterized in that: The bracket (1) comprises a bottom frame (11), on which a plurality of bearing seats (13) are arranged, and a support shaft (53) of the support arm (2) is arranged to pass through the bearing seats (13); a motor (12) is arranged on the side of the bottom frame (11), and a plurality of third sprockets are arranged on the output shaft of the motor (12); a fourth sprocket is arranged on the support arm (2), and an adjustable first sprocket (14) is arranged between the third sprocket and the fourth sprocket; the first sprocket (14), the second sprocket (35), the third sprocket, and the fourth sprocket are connected by a chain.

8. The paper centering structure for single-blade dual-rotation synchronous slitting according to claim 7 is characterized in that: The central axis of the first sprocket (14) is connected through a bearing and passes through a bottom rod (15); a counterweight column (17) is arranged below the bottom rod (15); a plug-in plate (16) on the top of the counterweight column (17) is connected and inserted into the bottom rod (15) through bolts; the bottom rod (15) passes through a through hole (18) of the bearing seat (13) and the bottom frame (11).

9. The paper centering structure for single-blade dual-rotation synchronous slitting according to claim 1 is characterized in that: Two spiral columns (45) are symmetrically arranged on the limiting rod (4), and the spiral columns (45) are in contact with the paper; the end of the limiting rod (4) is connected and inserted into the end plate (42) through a bearing, and a slide plate (43) is arranged on the side of the two end plates (42) away from each other, and the slide plate (43) is penetrated and arranged in the strip hole (21) of the support arm (2); a spring (41) is arranged on the connecting column (44) of the slide plate (43) protruding from the strip hole (21), and the other end of the spring (41) is connected to the support arm (2).

10. The paper centering structure for single-blade dual-rotation synchronous slitting according to claim 1, characterized in that: The bracket (1) also includes two driving arms (52), and the two driving arms (52) are connected to the support arm (2) through a support shaft (53); a vertical plate (55) is provided through each of the driving arms (52), and a connecting pipe (552) is adjustably provided on the vertical plate (55), and a brake shaft (554) is provided through the connecting pipe (552), and the end of the brake shaft (554) is inserted into the sliding hole of the driving arm (52); a horizontal plate (54) is provided at the bottom between the two vertical plates (55), and a telescopic cylinder (51) is adjustably provided on the horizontal plate (54), and the telescopic end of the telescopic cylinder (51) can contact the side column of the driving arm (52).

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