Automatic overlapping device for paper rolls

Abstract

The present invention discloses an automatic overlapping device for roll paper, comprising an overlapping platform, wherein a paper tray support frame for setting up new and old paper trays is arranged on the overlapping platform, and paper deviation correction mechanisms are arranged on the inner sides of the paper tray support frames for setting up new and old paper trays on the overlapping platform. Paper on the new paper tray and paper on the old paper tray are both fed into an overlapping cavity through the paper deviation correction mechanism, and an overlapping component for overlapping new and old paper is arranged inside the overlapping cavity. The present invention arranges two overlapping components movable with each other inside the overlapping cavity through the arrangement of the overlapping cavity, and the spacing between overlapping rollers in the two overlapping components is adjusted, so that the overlapping cavity can realize overlapping of new and old paper of different thicknesses, and has high flexibility and a wide range of applications.

Description

Technical Field

[0001] The invention relates to the technical field of paper tray overlapping, and in particular to an automatic overlapping device for rolled paper. Background Art

[0002] At present, the switching overlap method of the new and old paper discs in the filter rod forming machine such as KDF2 filter rod forming machine has changed from the initial static overlap to the current non-stop high-speed overlap. However, no matter which overlap method is used, double-sided tape is required, which brings many problems.

[0003] For example, patent application No. 201921250648.9 discloses a paper disc switching device for a filter rod forming machine, comprising: a paper feeding motor, a paper feeding connecting shaft, a paper feeding roller shaft and a paper feeding roller, a rubber pressure roller and a paper storage box, an overlapping motor, an overlapping connecting shaft and an overlapping roller, a transition roller and a concave-convex mold, which realizes the tape-free splicing of the new and old paper discs. The paper feeding motor drives the new paper disc from a stationary state to synchronize with the main motor speed of the filter rod forming machine, so that the new and old paper discs are in a relatively stationary state, and then the overlap of the new and old paper discs is completed through the mold cooperation between the overlapping roller and the transition roller. However, the existing roll paper overlap still has problems such as inconvenient overlap and paper deviation during use. Summary of the invention

[0004] The object of the present invention is to provide an automatic overlapping device for roll paper, which realizes the correction of new and old paper before overlapping by setting a paper correction structure, so that the new and old paper can be overlapped through an overlapping cavity after the correction, and the overlapping paper can be trimmed by a trimming mechanism, the overlapping paper can be tightened by a clamping mechanism, and the paper can be sheared by a shearing mechanism.

[0005] The technical problems solved by the present invention are:

[0006] (1) How to prevent the new and old paper from deflecting during the overlapping process;

[0007] (2) How to trim and cut the overlapped paper;

[0008] (3) How to realize the overlapping cavity to overlap papers of different thicknesses.

[0009] The purpose of the present invention can be achieved through the following technical solutions:

[0010] A paper roll automatic overlapping device comprises an overlapping platform, wherein the overlapping platform is provided with a paper tray support frame for setting up new and old paper trays, the inner sides of the paper tray support frame for setting up new and old paper trays on the overlapping platform are provided with paper deviation correction mechanisms, the paper on the new paper tray and the paper on the old paper tray are both fed into an overlapping cavity through the paper deviation correction mechanism, and an overlapping component for overlapping new and old paper is provided inside the overlapping cavity.

[0011] As a further solution of the present invention: the receiving plate of the paper correcting mechanism is fixedly set on the vertical plate of the overlapping platform, the receiving plate has an arc-shaped structure and guide grooves are opened longitudinally on both sides of the plate surface of the receiving plate, a screw rod is arranged on the inner side of the concave surface of the receiving plate, the screw rod is fixedly set on the vertical plate, the threads at both ends of the screw rod have opposite rotation directions, and movable disks are symmetrically arranged at both ends of the screw rod through threaded connection, and circular disks are rotatably connected to the movable disks at both ends, a connecting rod is arranged on the outer circumferential surface of the circular disk, the connecting rod passes through the guide groove of the receiving plate and is connected to the correcting plate, the correcting plate has an arc-shaped structure, and the concave surface of the correcting plate is adapted to the convex surface of the receiving plate.

[0012] As a further solution of the present invention: the movable disk is in an I-shaped structure, and the circular disk is clamped in the outer circular groove of the movable disk.

[0013] As a further solution of the present invention: the paper tray support frame includes a base fixedly arranged on the bottom plate of the overlapping platform, slide rails are arranged on both sides of the top surface of the base, and a paper tray mounting roller for mounting the paper supply tray is slidably connected to the slide rails of the base, and a cylinder 1 is fixedly arranged on the top of the end surface of the base, and the piston rod of the cylinder 1 is fixedly connected to the side of the paper tray mounting roller.

[0014] As a further solution of the present invention: a conveying roller group is arranged between the paper correction mechanism and the overlapping cavity, and the conveying roller group is arranged directly below the paper feed port of the overlapping cavity. The conveying roller group consists of three conveying rollers, and the three conveying rollers are arranged in a regular triangle structure, and gaps are left between the three conveying rollers for paper to pass through.

[0015] As a further solution of the present invention: the lap joint cavity is a four-frame structure, the lap joint components are symmetrically arranged on both sides of the lap joint cavity along the center line direction, the lap joint cavity is provided with two screws on both sides of the lap joint cavity, the threads of the two screws along the center line direction are opposite, and the connecting ears on both sides of the lap joint component are threadedly connected to the two screws;

[0016] The overlapping assembly includes a C-shaped plate, connecting ears are fixedly provided on both sides of the outside of the C-shaped plate, overlapping rollers are provided inside the C-shaped plate, a pulley is provided at one end of the rotating shaft mounted by the overlapping rollers, and a motor is provided on the outer side of the C-shaped plate, and the output end of the motor is connected to the pulley through a belt.

[0017] As a further solution of the present invention: driven gears are arranged at both ends of the screws on both sides of the overlapping cavity, a motor is fixedly arranged outside the overlapping cavity, the output shaft of the motor passes through the overlapping cavity and is provided with a driving gear, and the driving gear is connected to the driven gears on both sides through a gear belt.

[0018] As a further solution of the present invention: a trimming mechanism is fixedly arranged on the overlapping table, and the trimming mechanism is located at the rear end of the overlapping cavity along the paper traveling direction, a cylinder 2 of the trimming mechanism is fixedly arranged on the top of the overlapping table, a U-shaped plate frame 1 is fixedly arranged on the end of the piston rod of the cylinder 2, a screw 3 is arranged inside the U-shaped plate frame 1, the threads of the screw 3 at both ends along the center line direction are opposite, nut seats 3 are symmetrically arranged at both ends of the screw 3, a trimming motor is arranged at the bottom of the nut seat 3, and a trimming wheel is arranged at the output end of the trimming motor.

[0019] As a further solution of the present invention: a clamping mechanism for fixing paper is arranged on the overlapping platform and on both sides of the trimming mechanism, a screw rod four of the clamping mechanism is arranged on the back side of the vertical plate of the overlapping platform, the threads of the screw rod four at both ends along the center direction are in opposite directions, and nut seats four are symmetrically arranged at both ends of the screw rod four through threaded connection, a support rod frame is arranged on the front side of the nut seat four, and the support rod frame passes through the vertical groove on the front side of the overlapping platform and is connected to a clamping roller.

[0020] As a further solution of the present invention: a shearing mechanism is arranged between the two clamping mechanisms, and one end of the two shearing arms of the shearing mechanism is provided with a sliding rod, the sliding rod passes through the C-shaped groove on the front side of the overlapping platform, and a shearing knife is arranged on the sliding rod of the two shearing arms, and the other end of the two shearing arms of the shearing mechanism is hinged with a connecting plate, the other end of the connecting plate is hinged on the nut seat five, and the nut seat five is slidably connected to the screw rod five.

[0021] Beneficial effects of the present invention:

[0022] (1) The present invention adjusts the position of the movable disks at both ends of the screw rod by setting a paper deflection correction mechanism and rotating the movable disk, so that the circular disk drives the deflection correction plate to move on the receiving plate through the connecting rod, thereby realizing that the distance between the two deflection correction plates on the receiving plate is adjusted according to the paper width, realizing the positioning of the paper during the movement process, and can effectively prevent the deviation of the new and old papers before overlapping, thereby improving the overlapping accuracy of the new and old papers. At the same time, through the setting of the paper tray support frame, the cylinder drives the piston rod to push the paper tray installation roller to move on the base, and the position of the new and old paper trays is adjusted in coordination with the paper deflection correction mechanism, that is, through the two-stage deflection correction adjustment, the overlapping accuracy of the new and old papers is further guaranteed;

[0023] (2) In the present invention, a trimming mechanism is provided, that is, the trimming mechanism is used to trim the new and old papers after the overlap is completed. The trimming mechanism performs double-sided trimming on the overlapped papers, that is, the trimming mechanism is used to achieve synchronous trimming of both sides of the papers, with high trimming efficiency and neat trimming ends. In addition, two clamping mechanisms are provided on the overlap platform, and the clamping mechanisms are used to clamp the papers, so that the shearing mechanism can shear the papers, which can effectively prevent the sheared papers from being wrinkled, and has strong practicality.

[0024] (3) The present invention sets up two overlapping components that can move relative to each other in the overlapping cavity, and adjusts the spacing between the overlapping rollers in the two overlapping components so that the overlapping cavity can overlap new and old paper of different thicknesses. The invention has high flexibility and a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] Figure 1 It is a front view of the present invention;

[0027] Figure 2 It is a schematic diagram of the structure of the movable disk in the present invention;

[0028] Figure 3 It is a structural schematic diagram of the receiving plate in the present invention;

[0029] Figure 4 It is a structural schematic diagram of the overlapping cavity in the present invention;

[0030] Figure 5 It is a structural schematic diagram of the paper tray support frame in the present invention;

[0031] Figure 6 It is a structural schematic diagram of the trimming mechanism in the present invention;

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

[0033] Figure 8 It is a structural schematic diagram of the shearing mechanism in the present invention.

[0034] In the figure: 1. Overlapping platform; 101. Paper tray support frame; 1011. Base; 1012. Paper tray mounting roller; 1013. Slide rail; 1014. Cylinder 1; 2. Paper deflection correction mechanism; 201. Screw 1; 202. Moving plate; 203. Disc; 204. Connecting rod; 205. Receiver plate; 206. Guide groove; 207. Deflection correction plate; 3. Conveying roller group; 4. Overlapping chamber; 401. Screw 2; 402. Overlapping assembly; 4021. C-type plate ; 4022, connecting ear; 4023, overlapping roller; 5, trimming mechanism; 501, cylinder two; 502, U-shaped plate frame one; 503, screw three; 504, nut seat three; 505, trimming motor; 6, clamping mechanism; 601, screw four; 602, nut seat four; 603, clamping roller; 7, shearing mechanism; 701, C-shaped groove; 702, shearing knife; 703, sliding rod; 704, screw five; 705, nut seat five; 706, connecting plate. DETAILED DESCRIPTION

[0035] 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.

[0036] Example 1

[0037] See also Figure 1-Figure 5 As shown, the present invention is an automatic paper roll splicing device, a paper tray support frame 101 for mounting new and old paper trays is provided on a splicing platform 1, and the new and old paper trays are mounted on the paper tray support frame 101 respectively;

[0038] The paper tray support frame 101 includes a base 1011 fixedly arranged on the bottom plate of the lap platform 1, and slide rails 1013 are arranged on both sides of the top surface of the base 1011. A paper tray installation roller 1012 for installing the paper supply tray is slidably connected to the slide rails 1013 of the base 1011, and a cylinder 1014 is fixedly arranged on the top of the end surface of the base 1011, and the piston rod of the cylinder 1014 is fixedly connected to the side of the paper tray installation roller 1012;

[0039] When in use, the piston rod is driven by cylinder 1014 to push the paper tray installation roller 1012 to move on the slide rail 1013 of the base 1011, and the positions of the new and old paper trays are adjusted in conjunction with the paper correction mechanism 2 to form a first-level correction adjustment during the overlapping process, which can ensure the overlapping accuracy of the new and old papers.

[0040] The paper on the new paper tray and the paper on the old paper tray are fed into the overlapping chamber 4 through the paper deflection correction mechanism 2, and the paper deflection correction mechanism 2 realizes secondary deflection correction adjustment during the overlapping process of the new and old papers;

[0041] The receiving plate 205 of the paper deviation correction mechanism 2 is fixedly arranged on the vertical plate of the lap platform 1, the receiving plate 205 is in an arc-shaped structure and guide grooves 206 are longitudinally provided on both sides of the plate surface of the receiving plate 205, a screw 201 is arranged on the inner side of the concave surface of the receiving plate 205, the screw 201 is fixedly arranged on the vertical plate, the threads at both ends of the screw 201 are in opposite directions, and the two ends of the screw 201 are symmetrically provided with a moving plate 201 through threaded connection. 2. The movable disks 202 at both ends are rotatably connected with disks 203. The outer circumferential surface of the disks 203 is provided with connecting rods 204. The connecting rods 204 penetrate the guide grooves 206 of the receiving plate 205 and connect to the correcting plate 207. Through the limiting effect of the connecting rods 204, the movement of the correcting plate 207 on the receiving plate 205 is more stable. The correcting plate 207 is in an arc-shaped structure, and the concave surface of the correcting plate 207 is adapted to the convex surface of the receiving plate 205.

[0042] When in use, the positions of the movable disks 202 at both ends of the screw rod 201 are adjusted by rotating the movable disk 202, so that the disc 203 drives the correcting plate 207 to move on the receiving plate 205 through the connecting rod 204, so that the distance between the two correcting plates 207 on the receiving plate 205 is adjusted according to the width of the paper, so as to realize the positioning of the paper during its movement and the secondary correcting positioning during the overlapping process, which can effectively prevent the new and old papers from shifting before overlapping and improve the overlapping accuracy of the new and old papers.

[0043] The new and old paper sheets after two-stage deflection correction are introduced into the overlapping chamber 4 for overlapping;

[0044] The lap joint cavity 4 is a four-frame structure, and lap joint components 402 are symmetrically arranged on both sides of the lap joint cavity 4 along the center line direction, and screw rods 401 are arranged on both sides of the lap joint cavity 4 along the center line direction. The threads of the screw rods 401 at both ends along the center line direction are opposite to each other, and the connecting ears 4022 on both sides of the lap joint component 402 are threadedly connected to the screw rods 401, and the connecting ears 4022 are provided with threaded through holes that are compatible with the screw rods 401;

[0045] The overlap assembly 402 includes a C-shaped plate 4021, connecting ears 4022 are fixedly provided on both sides of the outside of the C-shaped plate 4021, an overlap roller 4023 is provided inside the C-shaped plate 4021, a pulley is provided at one end of the rotating shaft mounted by the overlap roller 4023, and a motor is provided on the outer side of the C-shaped plate 4021, and the output end of the motor is connected to the pulley through a belt;

[0046] Driven gears are arranged at the ends of the screw rods 401 on both sides of the overlapping cavity 4, a motor is fixedly arranged outside the overlapping cavity 4, and a driving gear is arranged on the output shaft of the motor passing through the overlapping cavity 4, and the driving gear is connected to the driven gears on both sides through gear belts.

[0047] When in use, the motor outside the overlapping chamber 4 drives the active gear to drive the driven gears on both sides of the screw rod 401 to rotate through the gear belt, so that the screw rods 401 on both sides of the overlapping chamber 4 rotate synchronously, and the overlapping components 402 at both ends of the screw rod 401 move synchronously, so that the overlapping components 402 move toward or in the opposite direction inside the overlapping chamber 4 according to the thickness of the overlapping paper, that is, by adjusting the spacing between the overlapping rollers 4023 in the two overlapping components 402, the overlapping chamber 4 can overlap new and old papers of different thicknesses, with high flexibility and wide application range;

[0048] The overlapping rollers 4023 in the two overlapping assemblies 402 are driven by a motor to rotate in opposite directions during the overlapping process, thereby achieving meshing overlapping of new and old paper.

[0049] Among them, the movable disk 202 in the paper correction mechanism 2 is an I-shaped structure, and the disk 203 is clamped in the outer circle groove of the movable disk 202, so that the disk 203 can rotate on the outer circle of the movable disk 202, avoiding the disk 203 from rotating with the rotation of the movable disk 202.

[0050] Among them, a conveying roller group 3 is arranged between the paper correction mechanism 2 and the overlapping cavity 4. The conveying roller group 3 is arranged directly below the paper feed port of the overlapping cavity 4. The conveying roller group 3 consists of three conveying rollers, which are arranged in a regular triangle structure, and there is a gap between the three conveying rollers for the paper to pass through. Through the overlapping of the three conveying rollers, the new and old papers can be synchronously and quickly routed.

[0051] Example 2

[0052] See also Figure 6 The implementation of this embodiment is basically consistent with that of embodiment 1, except that a trimming mechanism 5 is fixedly arranged on the overlapping platform 1, and the trimming mechanism 5 is located at the rear end of the overlapping cavity 4 along the paper traveling direction, the cylinder 2 501 of the trimming mechanism 5 is fixedly arranged on the top of the overlapping platform 1, and a U-shaped plate frame 1 502 is fixedly arranged at the piston rod end of the cylinder 2 501, and a screw 3 503 is arranged inside the U-shaped plate frame 1 502, and the threads of the screw 3 503 at both ends along the center line direction are opposite, and nut seats 3 504 are symmetrically arranged at both ends of the screw 3 503, and a trimming motor 505 is arranged at the bottom of the nut seat 3 504, and a trimming wheel is arranged at the output end of the trimming motor 505.

[0053] When in use, the cylinder 2 501 drives the piston rod to push the U-shaped plate frame 1 502 to move in the vertical direction, so that the U-shaped plate frame 1 502 drives the trimming wheel to abut against the overlapped paper, and the motor drives the screw 3 503 to rotate, so that the screw 3 503 drives the nut seats 3 504 at both ends to move toward or in the opposite direction, so as to adjust the distance between the two trimming wheels, and the trimming motor 505 drives the trimming wheel to trim the paper;

[0054] That is, by setting the trimming mechanism 5, the trimming mechanism 5 performs double-side trimming on the overlapped paper, that is, the trimming mechanism 5 realizes synchronous trimming on both sides of the paper, and the trimming efficiency is high.

[0055] Example 3

[0056] See also Figure 7-Figure 8The implementation of this embodiment is basically the same as that of the embodiment 1, except that a clamping mechanism 6 for fixing paper is provided on the lap joint platform 1 and on both sides of the trimming mechanism 5, the screw rod 4 601 of the clamping mechanism 6 is provided on the back of the vertical plate of the lap joint platform 1, the screw rod 4 601 has opposite screw threads at both ends along the center direction, and the two ends of the screw rod 4 601 are symmetrically provided with nut seats 4 602 through threaded connection, and a support rod frame is provided on the front of the nut seat 4 602, and the support rod frame passes through the vertical groove on the front of the lap joint platform 1. A clamping roller 603 is connected, a shearing mechanism 7 is arranged between the two clamping mechanisms 6, one end of the two shearing arms of the shearing mechanism 7 is provided with a sliding rod 703, the sliding rod 703 penetrates the C-shaped groove 701 on the front of the lap joint 1, and a shearing knife 702 is arranged on the sliding rod 703 of the two shearing arms, the other end of the two shearing arms of the shearing mechanism 7 is hinged with a connecting plate 706, the other end of the connecting plate 706 is hinged on the nut seat five 705, and the nut seat five 705 is slidably connected to the screw rod five 704;

[0057] When in use, the two clamping mechanisms 6 clamp the paper during the conveying process, and the shearing mechanism 7 shears the clamped paper;

[0058] When the two clamping mechanisms 6 are working, the motor drives the screw rod 4 601 to rotate, so that the screw rod 4 601 drives the nut seats 4 602 at both ends to move toward each other, thereby making the two clamping rollers 603 move toward each other to achieve clamping of the paper;

[0059] When the shearing mechanism 7 is in use, the motor drives the screw rod 5 704 to rotate, so that the screw rod 5 704 drives the nut seat 5 705 to move in the horizontal direction, and the nut seat 5 705 drives the connecting plate 706 to act on the two shearing arms, so that the sliding rods 703 at the other ends of the two shearing arms slide toward each other in the C-shaped groove 701, thereby realizing the shearing knife 702 on the shearing arm to shear the paper.

[0060] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. An automatic paper roll splicing device, comprising a splicing platform (1), wherein the splicing platform (1) is provided with a paper tray support frame (101) for mounting new and old paper trays, characterized in that: A paper deviation correction mechanism (2) is arranged on the inner side of a paper tray support frame (101) on which new and old paper trays are mounted on the overlapping platform (1); the paper on the new paper tray and the paper on the old paper tray are both fed into the overlapping chamber (4) through the paper deviation correction mechanism (2); and a overlapping assembly (402) for overlapping new and old paper is arranged inside the overlapping chamber (4); The receiving plate (205) of the paper deviation correction mechanism (2) is fixedly arranged on the vertical plate of the overlap platform (1); the receiving plate (205) is in an arc-shaped structure and guide grooves (206) are provided on both sides of the receiving plate (205) along the longitudinal direction; a screw rod (201) is provided on the inner side of the concave surface of the receiving plate (205); the screw rod (201) is fixedly arranged on the vertical plate; the threads at both ends of the screw rod (201) are in opposite directions; the screw rod (201) is provided with a screw thread. The two ends are symmetrically provided with moving disks (202) through threaded connection, and the moving disks (202) at the two ends are rotatably connected with disks (203), and the outer circumferential surface of the disks (203) is provided with connecting rods (204), and the connecting rods (204) penetrate the guide grooves (206) of the receiving plate (205) and connect to the deviation-correcting plate (207), and the deviation-correcting plate (207) is in an arc-shaped structure, and the concave surface of the deviation-correcting plate (207) is matched with the convex surface of the receiving plate (205); The movable disk (202) is in an I-shaped structure, and the circular disk (203) is clamped in the outer circular groove of the movable disk (202); A conveying roller group (3) is arranged between the paper deviation correction mechanism (2) and the overlapping cavity (4), and the conveying roller group (3) is arranged directly below the paper feeding port of the overlapping cavity (4). The conveying roller group (3) is composed of three conveying rollers, which are arranged in a regular triangle structure, and gaps are left between the three conveying rollers for the paper to pass through.

2. The automatic paper roll splicing device according to claim 1, characterized in that: The paper tray support frame (101) comprises a base (1011) fixedly arranged on the bottom plate of the overlapped platform (1), slide rails (1013) are arranged on both sides of the top surface of the base (1011), a paper tray mounting roller (1012) for mounting the paper supply tray is slidably connected to the slide rails (1013) of the base (1011), a cylinder 1 (1014) is fixedly arranged on the top of the end surface of the base (1011), and the piston rod of the cylinder 1 (1014) is fixedly connected to the side of the paper tray mounting roller (1012).

3. The automatic paper roll splicing device according to claim 1, characterized in that: The overlapping cavity (4) is a four-frame structure, and overlapping components (402) are symmetrically arranged on both sides of the interior of the overlapping cavity (4) along the center line direction, and screw rod 2 (401) is arranged on both sides of the interior of the overlapping cavity (4). The threads of the screw rod 2 (401) at both ends along the center line direction are opposite, and the connecting ears (4022) on both sides of the overlapping component (402) are threadedly connected to the screw rod 2 (401); the overlapping component (402) includes a C-shaped plate (4021), and connecting ears (4022) are fixedly arranged on both sides of the exterior of the C-shaped plate (4021), and an overlapping roller (4023) is arranged inside the C-shaped plate (4021), and a pulley is arranged at one end of the rotating shaft mounted by the overlapping roller (4023), and a motor is arranged on the outer side of the C-shaped plate (4021), and the output end of the motor is connected to the pulley through a belt.

4. The automatic paper roll splicing device according to claim 3 is characterized in that: The two ends of the screw rods (401) on both sides of the overlapping cavity (4) are provided with driven gears, and a motor is fixedly provided outside the overlapping cavity (4). The output shaft of the motor passes through the overlapping cavity (4) and is provided with a driving gear, and the driving gear is connected to the driven gears on both sides through a gear belt.

5. The automatic paper roll splicing device according to claim 1, characterized in that: A trimming mechanism (5) is fixedly arranged on the overlapping platform (1), and the trimming mechanism (5) is located at the rear end of the overlapping cavity (4) along the paper moving direction. The second cylinder (501) of the trimming mechanism (5) is fixedly arranged on the top of the overlapping platform (1). The piston rod end of the second cylinder (501) is fixedly arranged with a U-shaped plate frame (502). The interior of the U-shaped plate frame (502) is provided with a screw rod (503). The screw rods of the two ends of the screw rod (503) have opposite screw rotation directions along the center line direction. Nut seats (504) are symmetrically arranged at both ends of the screw rod (503). A trimming motor (505) is arranged at the bottom of the nut seat (504). A trimming wheel is arranged at the output end of the trimming motor (505).

6. The automatic paper roll splicing device according to claim 5, characterized in that: A clamping mechanism (6) for fixing paper is arranged on the overlapping platform (1) and located on both sides of the trimming mechanism (5); a screw rod four (601) of the clamping mechanism (6) is arranged on the back side of the vertical plate of the overlapping platform (1); the screw threads of the screw rod four (601) at both ends along the center direction are in opposite directions; nut seats four (602) are symmetrically arranged at both ends of the screw rod four (601) through threaded connection; a support rod frame is arranged on the front side of the nut seat four (602); and the support rod frame passes through the vertical groove on the front side of the overlapping platform (1) and is connected to a clamping roller (603).

7. The automatic paper roll splicing device according to claim 6, characterized in that: A shearing mechanism (7) is arranged between the two clamping mechanisms (6), and one end of the two shearing arms of the shearing mechanism (7) is provided with a sliding rod (703), and the sliding rod (703) passes through the C-shaped groove (701) on the front side of the lap joint (1), and a shearing knife (702) is arranged on the sliding rod (703) of the two shearing arms, and the other end of the two shearing arms of the shearing mechanism (7) is hinged with a connecting plate (706), and the other end of the connecting plate (706) is hinged on a nut seat five (705), and the nut seat five (705) is slidably connected to a screw rod five (704).

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