A paper splicing device and a rewinder

Abstract

The present invention belongs to the technical field of rewinding machines, and relates to a paper splicing device and a rewinding machine, which include a workbench, a unwinding mechanism, a paper head pulling mechanism, a tail end limiting mechanism, an automatic tape applicator, and a straightening mechanism. The paper head pulling mechanism includes a bracket, a connecting shaft, a rotating frame, and an air extraction box. The bracket is fixed on the workbench. One end of the rotating frame is rotatably connected to the top of the bracket through the connecting shaft. The air extraction box is installed on the rotating frame, and a through hole is provided on one side of the air extraction box. The tail end limiting mechanism includes a base, a torsion spring, and a pressing rod. The automatic tape applicator is used to bond the tape at the joint of the paper. The straightening mechanism includes a plurality of paper passing roller shafts. The air extraction box rotates to a position where it is at the same height as the paper head hanging down from the new paper roll, so that the air extraction box fits with the paper head. At the same time, the rotating frame continues to rotate downward, driving the paper head to move downward until it is parallel to the surface of the workbench and abuts against the surface of the workbench. Then, the paper head is pulled forward to be directly below the automatic tape applicator for bonding.

Description

Technical Field

[0001] The present invention relates to the technical field of rewinding machines, and more particularly to a paper splicing device and a rewinding machine. Background Art

[0002] In the process of paper manufacturing, the diameter of the newly manufactured paper reel is relatively large, and the paper needs to be split into smaller reels. During the process of splitting the paper, a rewinding machine is used. When a new paper roll is slit and rewound on the rewinding machine until the paper is consumed, and then when rewinding the next new paper roll, it is often necessary to leave the paper tail of the previous roll on the machine table, and then pull the paper head of the next new paper roll over to make a joint with the paper tail of the previous roll to continue the rewinding operation. In the prior art, when making a joint for paper splicing, most often the paper head of the new paper roll is torn and pulled over manually and pasted onto the paper tail on the machine table. The width of modern paper machines can exceed 10 meters at most. For a paper roll with a width of 10 meters, usually multiple people are needed to pull the paper head to ensure that the paper web is flat without wrinkles and the positions are aligned. The entire roll change and joint time is relatively long. Therefore, the efficiency of changing paper rolls for splicing often restricts the production capacity of the paper machine and becomes the production capacity bottleneck of the entire production line. The roll change time of the rewinding machine is one of the main factors affecting the production efficiency of the rewinding machine. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: In order to solve the problem of difficult paper splicing during roll change of the rewinding machine, the present invention provides a paper splicing device and a rewinding machine to solve the above problems.

[0004] The technical solution adopted by the present invention to solve its technical problems is: A paper splicing device and a rewinding machine, including a workbench and a unwinding mechanism, the unwinding mechanism is fixed on the workbench, the new paper roll is installed on the unwinding mechanism, and further includes a paper head pulling mechanism, a tail end limiting mechanism, an automatic tape applicator, and a straightening mechanism. The paper head pulling mechanism includes a bracket, a connecting shaft, a rotating frame, and an air extraction box. The bracket is fixed on the workbench. One end of the rotating frame is rotatably connected to the top of the bracket through the connecting shaft. The air extraction box is installed on the rotating frame. A through hole is opened on one side of the air extraction box, and the through hole on the air extraction box can be attached to the paper to adsorb the paper. The tail end limiting mechanism includes a base, a torsion spring, and a pressing rod. One end of the pressing rod is rotatably connected to the base. The two ends of the torsion spring are respectively fixed to the pressing rod and the base. The torsion spring is used to drive the pressing rod to rotate downward, and the paper passes through below the pressing rod. The automatic tape applicator is used to bond the tape to the joint at the end of the paper. The straightening mechanism is arranged in front of the unwinding mechanism to tighten the paper after the new paper roll is unwound. The straightening mechanism includes a plurality of paper passing roller shafts.

[0005] Preferably, the paper pulling head mechanism further includes a guide rod, a lead screw, a rod base, a slider, and a drive motor. The lead screw and the guide rod are parallel to each other and fixed on the rod base. The rod base is fixed on the side of the workbench. The drive motor is fixed on the rod base, and the output shaft of the drive motor is coaxially and fixedly connected to the lead screw. The slider is slidably mounted on the guide rod and is threadedly connected to the lead screw. The bracket is fixed on the slider, and the drive motor drives the slider to move horizontally along the guide rod through the lead screw.

[0006] Preferably, a worm and worm gear mechanism and a worm motor are further fixed at the top end of the bracket. The worm gear of the worm and worm gear mechanism is coaxially and fixedly connected to the connecting shaft. The worm of the worm and worm gear mechanism is coaxially and fixedly connected to the output shaft of the worm motor. The worm motor drives the rotating frame and the air extraction box to rotate around the connecting shaft through the worm and worm gear mechanism.

[0007] Preferably, a support plate is further fixed on the rotating frame, and a slide rod is vertically fixed on the air extraction box. The slide rod is vertically and slidably connected to the support plate. A telescopic cylinder is further fixed on the support plate. The piston rod of the telescopic cylinder passes through the support plate and is fixedly connected to the back of the air extraction box. The telescopic cylinder is used to drive the air extraction box to approach or move away from the support plate.

[0008] Preferably, an elastic limiting piece is installed near the lower side of the top end of the pressing rod. The elastic limiting piece is slidably connected to the pressing rod through a top rod. A spring is sleeved on the top rod. The two ends of the spring are respectively abutted against the elastic limiting piece and the pressing rod. The paper can pass through the lower side of the elastic limiting piece and abut against the elastic limiting piece. A paper pressing boss is further fixed at the position on the workbench below the elastic limiting piece. The top of the paper pressing boss is an upwardly convex arc surface, and the side surface of the paper pressing boss facing the paper pulling head mechanism is a concave arc surface. When the pressing rod rotates downward to the paper pressing boss, the elastic limiting piece can make the paper fit with the concave arc surface of the paper pressing boss and make the tail end of the paper flat on the surface of the workbench.

[0009] Preferably, the automatic tape pasting machine is erected above the workbench through an electric telescopic rod, and the electric telescopic rod is used to drive the automatic tape pasting machine to approach or move away from the paper.

[0010] A rewinder includes the above paper receiving device, and further includes: a slitting machine, which is arranged behind the straightening mechanism along the advancing direction of the paper, and the slitting machine is used for winding the paper conveyed by the unwinding mechanism.

[0011] The beneficial effects of the present invention are as follows: A paper pulling head mechanism is provided. After installing a new paper roll on the unwinding mechanism, the paper head of the new paper roll is opened. Then, the worm motor drives the air extraction box to rotate through the rotating frame to a position at the same height as the paper head hanging down from the new paper roll. After that, the driving motor drives the slider and the air extraction box to move towards the new paper roll through the lead screw, so that the air extraction box fits with the paper head. Then, the air pump sucks the inside of the air extraction box to a negative pressure state. At this time, the paper head is sucked by the air extraction box. After that, the unwinding mechanism starts to rotate slowly to convey the paper. At the same time, the rotating frame continues to rotate downward and drives the paper head to move downward until it is parallel to the surface of the workbench and abuts against the surface of the workbench. Then, the driving motor drives the slider and the air extraction box to move in the reverse direction through the lead screw, so that the air extraction box moves away from the new paper roll, thereby pulling the paper head forward to directly below the automatic tape pasting machine and making the paper head connect with the tail end of the previous roll of paper. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0013] Figure 1 is the overall structural schematic diagram of a paper connecting device and a rewinder of the present invention;

[0014] Figure 2 is the working state schematic diagram of a paper connecting device and a rewinder of the present invention;

[0015] Figure 3 is the structural schematic diagram of the support plate of a paper connecting device and a rewinder of the present invention;

[0016] Figure 4 is the structural schematic diagram of the elastic limit piece of a paper connecting device and a rewinder of the present invention;

[0017] Figure 5 is the structural schematic diagram of the automatic tape pasting machine of a paper connecting device and a rewinder of the present invention;

[0018] Figure 6 is the structural schematic diagram of the air extraction box of a paper connecting device and a rewinder of the present invention.

[0019] Reference numerals: 1, workbench; 2, unwinding mechanism; 3, new paper roll; 4, paper head pulling mechanism; 5, tail end limiting mechanism; 6, automatic tape pasting machine; 7, straightening mechanism; 8, bracket; 9, connecting shaft; 10, rotating frame; 11, air extraction box; 12, through hole; 13, paper; 14, base; 15, torsion spring; 16, pressure rod; 17, paper passing roller shaft; 18, guide rod; 19, lead screw; 20, rod seat; 21, slider; 22, drive motor; 23, worm and worm gear mechanism; 24, worm motor; 25, support plate; 26, slide bar; 27, telescopic cylinder; 28, elastic limiting piece; 29, ejector rod; 30, paper pressing boss; 31, concave arc surface; 32, electric telescopic rod; 33, paper splitting machine. Detailed implementation manners

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present invention.

[0021] As Figures 1 to 6 shown, the present invention provides an embodiment of a paper splicing device and a rewinder, including a workbench 1 and an unwinding mechanism 2. The unwinding mechanism 2 is fixed on the workbench 1, and a new paper roll 3 is installed on the unwinding mechanism 2. The paper splicing device further includes a paper head pulling mechanism 4, a tail end limiting mechanism 5, an automatic tape pasting machine 6 and a straightening mechanism 7.

[0022] The paper head pulling mechanism 4 includes a bracket 8, a connecting shaft 9, a rotating frame 10 and an air extraction box 11. The bracket 8 is fixed on the workbench 1. One end of the rotating frame 10 is rotatably connected to the top end of the bracket 8 through the connecting shaft 9. The air extraction box 11 is installed on the rotating frame 10. A through hole 12 is formed on one side of the air extraction box 11, and the through hole 12 on the air extraction box 11 can be attached to the paper 13 to adsorb the paper 13.

[0023] The paper head pulling mechanism 4 further includes a guide rod 18, a lead screw 19, a rod seat 20, a slider 21 and a drive motor 22. The lead screw 19 and the guide rod 18 are parallel to each other and fixed on the rod seat 20. The rod seat 20 is fixed on the side of the workbench 1. The drive motor 22 is fixed on the rod seat 20 and the output shaft of the drive motor 22 is coaxially and fixedly connected to the lead screw 19. The slider 21 is slidably installed on the guide rod 18 and is threadedly connected to the lead screw 19. The bracket 8 is fixed on the slider 21. The drive motor 22 drives the slider 21 to move horizontally along the guide rod 18 through the lead screw 19.

[0024] A worm and worm gear mechanism 23 and a worm motor 24 are further fixed to the top end of the bracket 8. The worm wheel of the worm and worm gear mechanism 23 is coaxially and fixedly connected to the connecting shaft 9. The worm of the worm and worm gear mechanism 23 is coaxially and fixedly connected to the output shaft of the worm motor 24. The worm motor 24 drives the rotating frame 10 and the air extraction box 11 to rotate around the connecting shaft 9 through the worm and worm gear mechanism 23.

[0025] A support plate 25 is also fixed on the rotating frame 10, and a sliding rod 26 is vertically fixed on the air extraction box 11. The sliding rod 26 is vertically and slidably connected to the support plate 25. A telescopic cylinder 27 is also fixed on the support plate 25. The piston rod of the telescopic cylinder 27 passes through the support plate 25 and is fixedly connected to the back surface of the air extraction box 11. The telescopic cylinder 27 is used to drive the air extraction box 11 to approach or move away from the support plate 25.

[0026] The working principle of the paper pulling head mechanism 4 is as follows: After a new paper roll 3 is installed on the unwinding mechanism 2, the paper head of the new paper roll 3 is opened. Then, the worm motor 24 drives the air extraction box 11 to rotate through the rotating frame 10 to a position at the same height as the paper head hanging down from the new paper roll 3. Then, the driving motor 22 drives the slider 21 and the air extraction box 11 to move towards the new paper roll 3 through the lead screw 19, so that the air extraction box 11 is attached to the paper head. Then, the air extraction box 11 is pumped to a negative pressure state through an air pump. At this time, the paper head is sucked by the air extraction box 11. Then, the unwinding mechanism 2 starts to rotate slowly to convey the paper 13. At the same time, the rotating frame 10 continues to rotate downward and drives the paper head to move downward until it is parallel to the surface of the workbench 1 and abuts against the surface of the workbench 1. Then, the driving motor 22 drives the slider 21 and the air extraction box 11 to move in the reverse direction through the lead screw 19, so that the air extraction box 11 moves away from the new paper roll 3, thereby pulling the paper head forward to directly below the automatic tape pasting machine 6 and making the paper head connect with the tail end of the previous roll of paper 13, completing the paper pulling head operation.

[0027] The straightening mechanism 7 is arranged in front of the unwinding mechanism 2 and is used to straighten the paper 13 after the new paper roll 3 is unwound. The straightening mechanism 7 includes a plurality of paper passing roller shafts 17. The paper 13 passes between the plurality of paper passing roller shafts 17 and is tightened on the paper passing roller shafts 17, sequentially increasing the tension of the paper 13 during the movement process to prevent the paper 13 from generating wrinkles during the unwinding and winding processes.

[0028] The tail end limiting mechanism 5 includes a base 14, a torsion spring 15 and a pressing rod 16. One end of the pressing rod 16 is rotatably connected to the base 14. The two ends of the torsion spring 15 are respectively fixedly connected to the pressing rod 16 and the base 14. The torsion spring 15 is used to drive the pressing rod 16 to rotate downward, and the paper 13 passes under the pressing rod 16.

[0029] An elastic limit piece 28 is installed at the lower side of the top end of the pressure bar 16. The elastic limit piece 28 is slidably connected to the pressure bar 16 through a push rod 29. A spring is sleeved on the push rod 29, and both ends of the spring are respectively abutted against the elastic limit piece 28 and the pressure bar 16. The paper 13 can pass through the lower part of the elastic limit piece 28 and abut against the elastic limit piece 28. A paper pressing boss 30 is also fixed at the position on the workbench 1 below the elastic limit piece 28. The top of the paper pressing boss 30 is an upward convex arc surface, and the side surface of the paper pressing boss 30 facing the paper pulling head mechanism 4 is an inward concave arc surface 31. When the pressure bar 16 rotates downward to the paper pressing boss 30, the elastic limit piece 28 can make the paper 13 fit with the inward concave arc surface 31 of the paper pressing boss 30 and make the tail end of the paper 13 lie flat on the surface of the workbench 1.

[0030] The working principle of the tail end limiting mechanism 5 is as follows: When the paper 13 of the new paper roll 3 is being normally conveyed, the elastic limit piece 28 and the pressure bar 16 are supported by the taut paper 13, causing the pressure bar 16 to lift upward. At this time, the torsion spring 15 is compressed and tightened. When the paper 13 of the new paper roll 3 is used up, one end of the paper 13 loses the pulling force and the paper 13 becomes loose. At this time, the torsion spring 15 resets and drives the pressure bar 16 to rotate downward, thereby pressing the paper 13 on the paper pressing boss 30. The paper 13 is continuously tightened by the tail end limiting mechanism 5 to prevent the paper 13 on the rear equipment from wrinkling. On the other hand, after the paper 13 is pressed on the paper pressing boss 30, the tail end of the paper 13 can naturally fall and lie flat on the surface of the workbench 1, so that the tail end of the paper 13 can be smoothly connected with the paper head of the new paper roll 3.

[0031] The automatic tape pasting machine 6 is used to bond the tape at the joint of the end of the paper 13. The automatic tape pasting machine 6 is erected above the workbench 1 through an electric telescopic rod 32, and the electric telescopic rod 32 is used to drive the automatic tape pasting machine 6 to approach or move away from the paper 13.

[0032] A rewinder includes the above-mentioned paper receiving device, and further includes: a splitting machine 33. The splitting machine 33 is arranged behind the straightening mechanism 7 along the advancing direction of the paper 13. The splitting machine 33 is used to wind up the paper 13 conveyed by the unwinding mechanism 2. When the paper 13 of the new paper roll 3 is used up, the operator operates the splitting machine 33 to slow down the winding speed and slowly wind up the remaining paper 13. When the tail end of the remaining paper 13 moves to directly below the automatic tape pasting machine 6, the splitting machine 33 can be turned off. Finally, after the paper head of the new paper roll 3 is connected with the tail end of the remaining paper 13 and bonded with tape by the paper pulling head mechanism 4, the splitting machine 33 can be started again to wind up the paper 13.

[0033] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0034] Taking the above-mentioned ideal embodiment of the present invention as an inspiration, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A paper receiving device, comprising a workbench (1) and an unwinding mechanism (2), wherein the unwinding mechanism (2) is fixed on the workbench (1), and a new paper roll (3) is mounted on the unwinding mechanism (2), characterized in that: It also comprises a paper head pulling mechanism (4), a tail end limiting mechanism (5), an automatic tape sticking machine (6) and a straightening mechanism (7); the paper head pulling mechanism (4) comprises a bracket (8), a connecting shaft (9), a rotating frame (10) and an air suction box (11); the bracket (8) is fixed on the workbench (1); one end of the rotating frame (10) is rotatably connected to the top of the bracket (8) through the connecting shaft (9); the air suction box (11) is mounted on the rotating frame (10); a through hole (12) is provided on one side of the air suction box (11); the through hole (12) on the air suction box (11) can be fitted with a paper (13) to adsorb the paper (13); the tail end limiting mechanism (5) comprises a rotating frame (10) and an automatic tape sticking machine (6) and a straightening mechanism (7); the paper head pulling mechanism (4) comprises a bracket (8), a connecting shaft (9), a rotating frame (10) and an air suction box (11); The mechanism (5) comprises a base (14), a torsion spring (15) and a pressure rod (16); one end of the pressure rod (16) is rotatably connected to the base (14); two ends of the torsion spring (15) are respectively fixedly connected to the pressure rod (16) and the base (14); the torsion spring (15) is used to drive the pressure rod (16) to rotate downward, and the paper (13) passes under the pressure rod (16); the automatic tape sticking machine (6) is used to stick the tape to the seam at the end of the paper (13); the straightening mechanism (7) is arranged in front of the unwinding mechanism (2) and is used to tighten the paper (13) after the new paper roll (3) is unrolled, and the straightening mechanism (7) comprises a plurality of paper feeding rollers (17); The paper pulling head mechanism (4) further comprises a guide rod (18), a screw rod (19), a rod seat (20), a slider (21) and a transmission motor (22); the screw rod (19) and the guide rod (18) are parallel to each other and fixed on the rod seat (20); the rod seat (20) is fixed on the side of the workbench (1); the transmission motor (22) is fixed on the rod seat (20) and the output shaft of the transmission motor (22) is coaxially fixedly connected to the screw rod (19); the slider (21) is slidably mounted on the guide rod (18) and is threadedly connected to the screw rod (19); the bracket (8) is fixed on the slider (21); and the transmission motor (22) drives the slider (21) to move horizontally along the guide rod (18) via the screw rod (19); A worm gear mechanism (23) and a worm motor (24) are also fixed to the top of the bracket (8); the worm wheel of the worm gear mechanism (23) is coaxially fixedly connected to the connecting shaft (9); the worm of the worm gear mechanism (23) is coaxially fixedly connected to the output shaft of the worm motor (24); and the worm motor (24) drives the rotating frame (10) and the vacuum box (11) to rotate around the connecting shaft (9) through the worm gear mechanism (23).

2. A paper splicing device according to claim 1, characterized in that: A support plate (25) is also fixed on the rotating frame (10), and a sliding rod (26) is vertically fixed on the vacuum box (11). The sliding rod (26) is vertically slidably connected to the support plate (25). A telescopic cylinder (27) is also fixed on the support plate (25). The piston rod of the telescopic cylinder (27) passes through the support plate (25) and is fixedly connected to the back side of the vacuum box (11). The telescopic cylinder (27) is used to drive the vacuum box (11) to move closer to or away from the support plate (25).

3. A paper splicing device according to claim 1, characterized in that: An elastic limiting piece (28) is installed at the lower side of the top end of the pressure rod (16); the elastic limiting piece (28) is slidably connected to the pressure rod (16) via a push rod (29); a spring is sleeved on the push rod (29); the two ends of the spring are respectively in contact with the elastic limiting piece (28) and the pressure rod (16); the paper (13) can pass through the bottom of the elastic limiting piece (28) and contact with the elastic limiting piece (28); the workbench (1) is located at the elastic limiting piece (29). 8) is also fixed at a position below the paper pressing boss (30), the top of the paper pressing boss (30) is an upwardly protruding arc surface, and the side of the paper pressing boss (30) facing the paper pulling head mechanism (4) is an inwardly concave arc surface (31), and when the pressing rod (16) is rotated downward to the paper pressing boss (30), the elastic limiting piece (28) can make the paper (13) fit with the inwardly concave arc surface (31) of the paper pressing boss (30) and make the tail end of the paper (13) flat on the surface of the workbench (1).

4. A paper splicing device according to claim 1, characterized in that: The automatic adhesive tape sticking machine (6) is mounted above the workbench (1) via an electric telescopic rod (32), and the electric telescopic rod (32) is used to drive the automatic adhesive tape sticking machine (6) to move closer to or farther away from the paper (13).

5. A rewinding machine, characterized in that: The paper splicing device comprises the paper splicing device as claimed in any one of claims 3 to 4, and further comprises: a reeling machine (33), wherein the reeling machine (33) is arranged at the rear side of the straightening mechanism (7) along the advancing direction of the paper (13), and the reeling machine (33) is used to reel the paper (13) conveyed by the unwinding mechanism (2).

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