A paper web tension control device

Abstract

A paper web tension control device, relating to the field of paper production technology, is disclosed. A frame groove is provided on both the front and rear vertical sections of a support frame, and a sliding block is slidably disposed within the frame groove. A tension roller is connected between the two sliding blocks. A baffle frame is fixed to the outer side of each vertical section on both the front and rear sides of the support frame. A moving block is fixed to the outer side of each sliding block. A support shaft is rotatably connected to the left side wall of the baffle frame via a bearing. A lead screw is provided at the right end of the support shaft, passing through the moving block and rotatably connected via a threaded connection. A synchronization component is provided between the two support shafts. Synchronous drive of the two lead screws is achieved through bevel gear meshing. Combined with a bearing seat stabilizing shaft and a boss limiting structure, synchronous displacement of both ends of the tension roller is ensured, significantly improving the accuracy of tension adjustment, completely avoiding tension deviation on both sides of the paper web, significantly reducing defects such as streaks and wrinkles, and improving paper web flatness and yield. It is adaptable to the processing requirements of different paper web specifications and operates stably and is easy to maintain.

Description

Technical Field

[0001] This invention relates to the field of paper production technology, and more specifically to a paper web tension control device. Background Technology

[0002] Tension control, as a core component of the entire papermaking process, directly affects paper web flatness, yield, and breakage frequency. High-precision tension control devices are crucial equipment for enterprises to enhance their competitiveness. In core processes such as unwinding, slitting, and rewinding in papermaking, the paper web is constantly in a dynamic transmission state. Tension stability directly determines the quality of the final product, and its importance extends throughout the entire process from raw paper roll processing to finished product slitting and packaging. Uneven tension during the papermaking process can lead to defects such as streaks, wrinkles, and uneven thickness on the paper surface. These defects not only seriously affect the appearance of the paper but also reduce its printability, coating uniformity, and other subsequent processing properties, causing high-value-added paper products to be downgraded due to appearance flaws. Although some devices are equipped with tension adjustment rollers, they often use a single-sided drive method, resulting in uneven force on both ends of the tension roller and poor synchronization of movement. This, in turn, causes tension deviations on both sides of the paper web, exacerbating new defects such as streaks and edge curling. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing a paper web tension control device that is simple in structure, rationally designed, and easy to use. It achieves synchronous drive of the two lead screws through bevel gear meshing, and with the support of bearing seat stabilizing shaft and boss limiting structure, it ensures synchronous displacement of both ends of the tension roller, greatly improves the accuracy of tension adjustment, completely avoids tension deviation on both sides of the paper web, significantly reduces defects such as streaks and wrinkles, and improves paper web flatness and yield. It is adaptable to the processing requirements of different paper web specifications, and is stable in operation and easy to maintain.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: it includes a support frame with an inverted "U" shaped structure and multiple guide rollers, the support frame is fixed on the machine frame, an unwinding roller is provided on the left side of the support frame, a take-up roller is provided on the right side of the support frame, and a slitting circular knife is also provided inside the support frame; The support frame has frame grooves on both the front and rear vertical sections, and sliding blocks are slidably installed in the frame grooves. A tension roller is connected between the two sliding blocks. A baffle is fixed to the outer side of the front and rear vertical sections of the support frame, and the baffle is located outside the frame groove. A moving block is fixed to the outer side of the sliding block, and the moving block is slidably installed in the baffle. A support shaft is rotatably connected to the left side wall of the baffle via a bearing. A lead screw is installed at the right end of the support shaft, and the lead screw passes through the moving block and is rotatably connected by a thread. A synchronization component is installed between the two support shafts. Support frames are installed on both the left and right sides of the support frame, and the support frames are fixed to the machine frame. The support frames are connected to the unwinding roller and the winding roller via a height adjustment component. By designing the above technical solution, a tension roller is added between multiple guide rollers, and the front and rear lead screws are driven simultaneously by a synchronization component. The lead screws drive the moving block, causing the tension roller to move, thereby adjusting the tension of the paper and improving the quality of paper processing. At the same time, the height of the unwinding roller and the winding roller is adjusted by a height adjustment component to regulate the tension force during paper web transmission.

[0005] As a further improvement of the present invention, the synchronization component includes a fixed frame, a driven bevel gear, a driving bevel gear, and a driving motor. The left side of the front and rear two retaining frames is connected and fixed to the fixed frame, and the support shaft is set inside the fixed frame. The driven bevel gear is sleeved and fixed on the support shaft. The driving motor is fixed on the rear outer wall of the fixed frame. The output shaft of the driving motor passes through the rear side wall of the fixed frame and is connected to a rotating shaft. The rotating shaft is set to the left side of the driven bevel gear. The front and rear driving bevel gears are sleeved and fixed on the rotating shaft, and the driving bevel gear and the driven bevel gear are meshed and engaged. Through the above technical solution design, the active motor is started, causing the active bevel gear to rotate. The active bevel gear meshes with the driven bevel gear and rotates around the rotation center of the support shaft, driving the lead screw to rotate and realizing the synchronous movement adjustment of the tension roller.

[0006] As a further improvement of the present invention, several bearing seats are fixed inside the fixed frame, and the rotating shaft passes through the bearing seats through the bearings; this improves the stability of the rotating shaft during rotation, reduces shaking, and ensures the accuracy of the bevel gear meshing transmission.

[0007] As a further improvement of the present invention, the height adjustment component includes a guide frame connecting block, a driving component, a driving motor, a transmission gear, and a support platform. Two guide frames are symmetrically fixed to the inner bottom surface of the support frame, and the guide frames are U-shaped. A connecting block slides through the guide frame, and the upper side of the connecting block slides through a groove on the upper side of the support frame. The support platform is located on the upper side of the support frame and fixed to the upper side of the connecting block. Positioning blocks are symmetrically fixed to the upper side of the support platform. The unwinding roller and the take-up roller are respectively positioned on opposite sides of the connecting block. Inside the two positioning blocks; a drive rod is fixed on the outer wall of the connecting block. The drive motor is fixed to the inner wall of one side of the support frame through the motor bracket. The drive motor is located between the front and rear guide frames. A rotating shaft is provided on the output end of the drive motor. A driven shaft is provided on the front side of the rotating shaft. Transmission gears are sleeved and fixed on both the rotating shaft and the driven shaft. The two transmission gears mesh and transmit power. A drive component is provided on the left side of the transmission gear. The drive component is sleeved and fixed on the rotating shaft and the driven shaft. The drive component is located on the left side of the guide frame. The drive rod slides through the groove of the drive component. By designing the above technical solution, starting the drive motor causes the output shaft to rotate, which in turn drives the transmission gear to rotate. This transmission gear meshes with the transmission gear on the driven shaft, causing the shaft and driven shaft to rotate synchronously relative to each other. This, in turn, drives the two drive components to rotate simultaneously, which in turn drives the drive rod, causing the connecting block to move within the guide frame. This, in turn, moves the support platform, causing the unwinding roller and the winding roller to move in height, thereby achieving the purpose of tensioning the paper.

[0008] As a further improvement of the present invention, the left end of the drive rod is provided with an anti-slip limiting platform, the outer diameter of which is larger than the groove width.

[0009] As a further improvement of the present invention, the upper and lower sides of the movable block are fixed with bosses, and the bosses are arranged in contact with the outer side of the vertical section of the support frame; the movement trajectory of the movable block is limited, the stability of the movable block during movement is improved, and deviation during movement is avoided.

[0010] As a further improvement of the present invention, an elastic rubber layer is provided on the outer wall of the tension roller; the elastic rubber layer can buffer the pressure of the tension roller on the paper web and prevent the paper web from being damaged.

[0011] As a further improvement of the present invention, the surface of the elastic rubber layer is provided with uniformly distributed anti-slip textures; the anti-slip textures can increase the friction between the tension roller and the paper web, prevent the paper web from slipping during the adjustment process, and ensure the accuracy of tension adjustment.

[0012] As a further improvement of the present invention, an anti-disengagement block is fixed at the end of the lead screw away from the support shaft, and the outer diameter of the anti-disengagement block is larger than the inner diameter of the lead screw through hole on the moving block.

[0013] The working principle of this invention: The paper roll is installed on the unwinding roller on the left side of the support frame. After the paper web is drawn out, it passes through multiple guide rollers on the support frame in sequence. It is then slit by a slitting circular knife inside the support frame, and then conveyed by the surface contact of the tension roller. Finally, the finished paper web is wound up by the winding roller on the right side of the support frame, forming a complete paper web conveying path. If the tension is too loose, too tight, or uneven during the paper web conveying process, the active motor on the outer wall of the rear side of the fixed frame is activated. The output shaft of the active motor drives the rotating shaft passing through the rear side wall of the fixed frame to rotate synchronously. Two fixed front and rear active bevel gears are sleeved on the rotating shaft. They rotate synchronously with the rotating shaft and mesh with the driven bevel gear on the support shaft, thereby driving the support shaft to rotate around its own axis. The lead screw at the right end of the support shaft rotates synchronously with the support shaft. Because the lead screw passes through the moving block and is connected by a thread, the lead screw... The rotational motion of the rod is converted into the horizontal linear motion of the moving block along the stop frame, which in turn drives the sliding block to move synchronously along the frame groove of the support frame. Finally, it drives the tension roller between the front and rear sliding blocks to achieve horizontal position adjustment. When the paper web tension is too loose, the tension roller moves to the left to stretch the paper web and increase the tension. When the paper web tension is too tight, the tension roller moves to the right to loosen the paper web and reduce the tension, achieving precise control of tension. At the same time, by starting the drive motor of the height adjustment component, the rotating shaft, driven shaft and transmission gear are driven to rotate, so that the drive component rotates synchronously and drives the drive rod to move, which in turn drives the connecting block to slide along the guide frame, realizing the height adjustment of the support platform and the unwinding and rewinding rollers. This works in conjunction with the horizontal adjustment of the tension roller to further optimize the paper web tension and adapt to the transmission requirements of different paper web specifications.

[0014] Compared with the prior art, the beneficial effects of the present invention are: The meshing structure of the active and driven bevel gears enables synchronous drive of the two lead screws, which in turn drives the tension roller to move synchronously at both ends. This fundamentally solves the problem of uneven force on the tension roller and tension deviation on both sides of the paper web caused by unilateral drive, effectively reducing defects such as streaks and wrinkles caused by uneven tension and sudden changes, and improving paper web flatness, subsequent processing performance, and yield. The baffle and fixed frame can shield the related structures for adjusting the movement of the tension roller, reducing the corrosion of internal components by dust and moisture in the papermaking workshop, extending the service life of the equipment, and reducing maintenance costs. The elastic rubber layer on the outer wall of the tension roller can buffer contact pressure to avoid damage to the paper web, and its surface anti-slip texture can increase friction and prevent paper web slippage, ensuring accurate transmission of tension adjustment. In addition, the synchronous drive structure of the double guide frame and double drive components can realize the smooth lifting and lowering of the unwinding and rewinding rollers, forming a two-way coordinated control with the horizontal adjustment of the tension roller, further improving the comprehensiveness and accuracy of tension control. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention.

[0016] Figure 2This is a schematic diagram of the southeast isometric structure of the present invention.

[0017] Figure 3 This is a schematic diagram of the front structure of the present invention.

[0018] Figure 4 This is a schematic diagram of the internal structure of the present invention.

[0019] Figure 5 This is a schematic diagram of the support frame in this invention.

[0020] Figure 6 This is a schematic diagram of the connection structure between the synchronization component and the moving block in this invention.

[0021] Figure 7 This is a schematic diagram of the internal structure of the support frame in this invention.

[0022] Figure 8 This is a schematic diagram of the structure in a specific implementation where the paper passes through the guide roller and tension roller.

[0023] Explanation of reference numerals in the attached figures: Guide roller 1, support frame 2, frame groove 2-1, frame 3, unwinding roller 4, winding roller 5, slitting circular knife 6, sliding block 7, tension roller 8, stop frame 9, moving block 10, support shaft 11, lead screw 12, synchronization assembly 13, fixed frame 13-1, driven bevel gear 13-2, driving bevel gear 13-3, driving motor 13-4, rotating shaft 13-5, bearing seat 13-6, boss 14, elastic rubber layer 15, support frame 16, height adjustment assembly 17, guide frame 17-1, connecting block 17-2, driving component 17-3, drive motor 17-4, transmission gear 17-5, support platform 17-6, positioning block 17-7, drive rod 17-8, anti-slip limit platform 17-9, anti-detachment stop block 18. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The preferred embodiments described are only examples. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1:

[0025] Please see Figures 1-8 This embodiment includes a support frame 2 with an inverted "U" shaped structure having multiple guide rollers 1. The support frame 2 is fixed on the frame 3. A unwinding roller 4 is provided on the left side of the support frame 2, a winding roller 5 is provided on the right side of the support frame 2, and a slitting circular knife 6 is also provided inside the support frame 2. The support frame 2 has frame grooves 2-1 on both the front and rear vertical sections, and a sliding block 7 is slidably disposed in the frame groove 2-1. A tension roller 8 is connected between the two sliding blocks 7. An elastic rubber layer 15 is sleeved on the outer wall of the tension roller 8. The surface of the elastic rubber layer 15 has evenly distributed anti-slip textures. A baffle 9 is fixed to the outer side of the front and rear vertical sections of the support frame 2, and the baffle 9 is disposed on the outer side of the frame groove 2-1. A moving block 10 is fixed to the outer side of the sliding block 7, and the moving block 10 is slidably disposed in the baffle 9. A boss 14 is fixed to the upper and lower sides of the moving block 10, and the boss 14 is in contact with the... On the outer side of the vertical section of the support frame 2; a support shaft 11 is rotatably connected to the left side wall of the baffle frame 9 via a bearing. A lead screw 12 is provided at the right end of the support shaft 11. The lead screw 12 passes through the moving block 10 and is rotatably connected by a thread. An anti-detachment block 18 is fixed at the end of the lead screw 12 away from the support shaft 11. The outer diameter of the anti-detachment block 18 is larger than the inner diameter of the hole through which the lead screw 12 passes on the moving block 10. A synchronization component 13 is provided between the two support shafts 11. Support frames 16 are provided on both the left and right sides of the support frame 2, and the support frames 16 are fixed on the frame 3. The support frames 16 are connected to the unwinding roller 4 and the winding roller 5 via a height adjustment component 17. Through the above technical solution design, a tension roller 8 is added between multiple guide rollers 1, and the front and rear lead screws 12 are driven simultaneously by the synchronization component 13. The lead screws 12 drive the moving block 10, so that the tension roller 8 moves, thereby realizing the tension adjustment of the paper and improving the quality of paper processing. At the same time, the height of the unwinding roller 4 and the winding roller 5 is adjusted by the height adjustment component 17 to adjust the tension force during paper web transmission. Example 2:

[0026] Please see Figures 1-8 Based on Embodiment 1, a further improvement is made. The synchronization component 13 includes a fixed frame 13-1, a driven bevel gear 13-2, a driving bevel gear 13-3, and a driving motor 13-4. The fixed frame 13-1 is fixedly connected to the left side of the two front and rear retaining frames 9, and a support shaft 11 is disposed inside the fixed frame 13-1. The driven bevel gear 13-2 is sleeved and fixed on the support shaft 11. The driving motor 13-4 is fixed on the rear outer wall of the fixed frame 13-1. The specific model of the driving motor 13-4 is determined according to the actual usage requirements. The motor 13-4 is purchased from the market, installed, and used. Its output shaft passes through the rear side wall of the fixed frame 13-1 and is connected to a rotating shaft 13-5. The rotating shaft 13-5 is located on the left side of the driven bevel gear 13-2. Two driving bevel gears 13-3 are sleeved and fixed on the rotating shaft 13-5, and the driving bevel gears 13-3 and the driven bevel gears 13-2 are meshed and engaged. Several bearing seats 13-6 are fixed inside the fixed frame 13-1, and the rotating shaft 13-5 rotates through the bearing seats 13-6 via the bearings. Through the above technical solution design, the active motor 13-4 is started, causing the active bevel gear 13-3 to rotate. The active bevel gear 13-3 meshes with the driven bevel gear 13-2 and rotates around the rotation center of the support shaft 11, driving the lead screw 12 to rotate, thereby realizing the synchronous movement adjustment of the tension roller 8. Example 3:

[0027] Please see Figures 1-8 Based on Embodiment 1, further improvements are made. The height adjustment component 17 includes a guide frame 17-1, a connecting block 17-2, a driving component 17-3, a driving motor 17-4, a transmission gear 17-5, and a support platform 17-6. Two guide frames 17-1 are symmetrically fixed to the inner bottom surface of the support frame 16, and the guide frames 17-1 are U-shaped. The connecting block 17-2 slides through the guide frame 17-1, and the upper side of the connecting block 17-2 slides through a groove on the upper side of the support frame 16. The support platform 17-6 is located on the upper side of the support frame 16 and is fixed to the upper side of the connecting block 17-2. Positioning blocks 17-7 are symmetrically fixed to the upper side of the support platform 17-6. The unwinding roller 4 and the winding roller 5 are respectively located within the two symmetrically positioned positioning blocks 17-7. A drive rod 17-8 is fixed on the outer wall of 17-2. A drive motor 17-4 is fixed on the inner wall of one side of the support frame 16 through a motor bracket. The drive motor 17-4 is located between the front and rear guide frames 17-1. A rotating shaft is provided on the output end of the drive motor 17-4. A driven shaft is provided on the front side of the rotating shaft. A transmission gear 17-5 is sleeved and fixed on both the rotating shaft and the driven shaft. The two transmission gears 17-5 mesh and transmit power. A drive component 17-3 is provided on the left side of the transmission gear 17-5. The drive component 17-3 is sleeved and fixed on the rotating shaft and the driven shaft. The drive component 17-3 is located on the left side of the guide frame 17-1. The drive rod 17-8 slides through the groove of the drive component 17-3. An anti-slip limiting platform 17-9 is provided on the left end of the drive rod 17-8. The outer diameter of the anti-slip limiting platform 17-9 is larger than the width of the groove opening. Through the above technical solution design, the drive motor 17-4 is started, causing its output shaft to rotate, which drives the transmission gear 17-5 to rotate. The transmission gear 17-5 meshes with the transmission gear 17-5 on the driven shaft, causing the shaft and the driven shaft to rotate synchronously relative to each other. This, in turn, drives the two drive components 17-3 to rotate simultaneously, driving the drive rod 17-8, which in turn drives the connecting block 17-2 to move smoothly along the guide frame 17-1, and drives the support platform 17-6 to move, causing the unwinding roller 4 and the take-up roller 5 to move in height, thereby achieving the purpose of tensioning the paper.

[0028] The working principle of this invention: The paper roll is installed on the unwinding roller 4 on the left side of the support frame 2. After the paper web is drawn out, it passes through multiple guide rollers 1 on the support frame 2 in sequence. It is then slit by the slitting circular knife 6 inside the support frame 2. After being conveyed by the surface contact of the tension roller 8, the finished paper web is finally wound up by the winding roller 5 on the right side of the support frame 2, forming a complete paper web conveying path. If the tension is too loose, too tight, or uneven during the paper web conveying process, the active motor 13-4 on the outer wall of the rear side of the fixed frame 13-1 is activated. The output shaft of the active motor 13-4 drives the rotating shaft 13-5 passing through the rear side wall of the fixed frame 13-1 to rotate synchronously. Two fixed front and rear active bevel gears 13-3 are sleeved on the rotating shaft 13-5. They rotate synchronously with the rotating shaft 13-5 and mesh with the driven bevel gear 13-2 on the support shaft 11, thereby driving the support shaft 11 to rotate around its own axis. The lead screw 12 at the right end of the support shaft 11 rotates synchronously with the support shaft 11. Because the lead screw 12 passes through the moving block 10 and passes through... The threaded connection converts the rotational motion of the lead screw 12 into the horizontal linear motion of the moving block 10 along the stop frame 9, which in turn drives the sliding block 7 to move synchronously along the frame groove 2-1 of the support frame 2. Finally, it drives the tension roller 8 between the front and rear sliding blocks 7 to achieve horizontal position adjustment. When the paper web tension is too loose, the tension roller 8 moves to the left to stretch the paper web and increase the tension. When the paper web tension is too tight, the tension roller 8 moves to the right to loosen the paper web and reduce the tension, thus achieving precise control of tension. At the same time, the drive motor 17-4 of the height adjustment component 17 can be started to drive the rotating shaft, driven shaft and transmission gear 17-5 to mesh and rotate, so that the drive component 17-3 rotates synchronously and drives the drive rod 17-8 to move, which in turn drives the connecting block 17-2 to slide along the guide frame 17-1, thereby achieving height adjustment of the support platform 17-6 and the unwinding roller 4 and winding roller 5. This works in conjunction with the horizontal adjustment of the tension roller 8 to further optimize the paper web tension and adapt to the transmission requirements of different paper web specifications.

[0029] Compared with the prior art, the beneficial effects of the present invention are: 1. By using the meshing structure of the active bevel gear 13-3 and the driven bevel gear 13-2, the synchronous drive of the two lead screws 12 is achieved, which drives the tension roller 8 to move synchronously at both ends. This fundamentally solves the problem of uneven force on the tension roller 8 and tension deviation on both sides of the paper web caused by unilateral drive; it significantly reduces defects such as streaks and wrinkles caused by uneven tension and sudden changes, improves the flatness of the paper web and the performance of subsequent processing, and increases the yield. 2. The baffle frame 9 and the fixed frame 13-1 shield the structure that adjusts the movement of the tension roller 8, reducing the corrosion of internal components by dust and moisture in the papermaking workshop; extending the service life of the equipment and reducing the frequency and cost of maintenance. 3. The elastic rubber layer 15 on the outer wall of the tension roller 8 can buffer the contact pressure with the paper web, preventing the paper web from being damaged due to sudden pressure changes during tension adjustment. At the same time, the uniform anti-slip texture on the surface of the elastic rubber layer 15 can increase the friction between the paper web and the tension roller 8, preventing the paper web from slipping relative to the tension roller 8 during tension adjustment, ensuring that the tension adjustment amount is accurately transmitted to the paper web, and further improving the tension control accuracy. 4. The structure of dual guide frame 17-1 and dual drive component 17-3 synchronous drive can realize the smooth lifting and lowering of unwinding roller 4 and winding roller 5. Combined with the horizontal tension adjustment of tension roller 8, it forms a two-way coordinated control, further improving the comprehensiveness and accuracy of paper web tension control.

[0030] For those skilled in the art, modifications can be made to the technical solutions described in the foregoing embodiments, and equivalent substitutions can be made to some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the protection scope of this invention.

Claims

1. A paper web tension control device, comprising a support frame (2) with an inverted "U" shaped structure provided with a plurality of guide rollers (1), the support frame (2) being fixed on a machine frame (3), an unwinding roller (4) being provided on the left side of the support frame (2), a winding roller (5) being provided on the right side of the support frame (2), and a slitting circular knife (6) being provided inside the support frame (2). Its features are: The support frame (2) has frame grooves (2-1) on both the front and rear vertical sections, and sliding blocks (7) are slidably arranged in the frame grooves (2-1). Tension rollers (8) are connected between the front and rear sliding blocks (7). A baffle frame (9) is fixed to the outer side of the vertical sections on both the front and rear sides of the support frame (2), and the baffle frame (9) is located outside the frame grooves (2-1). A moving block (10) is fixed to the outer side of the sliding block (7), and the moving block (10) is slidably arranged inside the baffle frame (9). A support shaft (11) is rotatably connected to the left side wall via a bearing. A lead screw (12) is provided at the right end of the support shaft (11). The lead screw (12) passes through the moving block (10) and is rotatably connected by a thread. A synchronization component (13) is provided between the two support shafts (11) at the front and rear. Support frames (16) are provided on both the left and right sides of the support frame (2), and the support frames (16) are fixed on the frame (3). The support frames (16) are connected to the unwinding roller (4) and the winding roller (5) via a height adjustment component (17).

2. The paper web tension control device according to claim 1, characterized in that: The synchronization component (13) includes a fixed frame (13-1), a driven bevel gear (13-2), a driving bevel gear (13-3), and a driving motor (13-4). The fixed frame (13-1) is connected and fixed to the left side of the two front and rear baffles (9), and the support shaft (11) is set inside the fixed frame (13-1). The driven bevel gear (13-2) is sleeved and fixed on the support shaft (11). The driving motor (13-4) is fixed on the rear outer wall of the fixed frame (13-1). The output shaft of the driving motor (13-4) passes through the rear side wall of the fixed frame (13-1) and is connected to a rotating shaft (13-5). The rotating shaft (13-5) is set to the left side of the driven bevel gear (13-2). The two driving bevel gears (13-3) are sleeved and fixed on the rotating shaft (13-5), and the driving bevel gear (13-3) and the driven bevel gear (13-2) are meshed and engaged.

3. The paper web tension control device according to claim 2, characterized in that: The fixed frame (13-1) has several bearing seats (13-6) fixed inside, and the rotating shaft (13-5) passes through the bearing seats (13-6) through the bearings.

4. The paper web tension control device according to claim 1, characterized in that: The height adjustment component (17) includes a guide frame (17-1), a connecting block (17-2), a driving component (17-3), a driving motor (17-4), a transmission gear (17-5), and a support platform (17-6). There are two guide frames (17-1), which are symmetrically fixed to the inner bottom surface of the support frame (16). The guide frame (17-1) is U-shaped. The connecting block (17-2) is slidably inserted inside the guide frame (17-1). The upper side of the connecting block (17-2) is slidably inserted into the groove opened on the upper side of the support frame (16). The support platform (17-6) is set on the upper side of the support frame (16) and is fixed to the upper side of the connecting block (17-2). Positioning blocks (17-7) are symmetrically fixed on the upper side of the support platform (17-6). The unwinding roller (4) and the winding roller (5) are respectively set on the front. Inside the two opposing positioning blocks (17-7); a drive rod (17-8) is fixed on the outer wall of the connecting block (17-2); the drive motor (17-4) is fixed on the inner wall of one side of the support frame (16) through the motor bracket, and the drive motor (17-4) is set between the front and rear guide frames (17-1); a rotating shaft is set on the output end of the drive motor (17-4); a driven shaft is set on the front side of the rotating shaft; and a transmission gear (17-5) is sleeved and fixed on both the rotating shaft and the driven shaft; the two transmission gears (17-5) mesh and cooperate; a drive component (17-3) is set on the left side of the transmission gear (17-5); and the drive component (17-3) is sleeved and fixed on the rotating shaft and the driven shaft; the drive component (17-3) is set on the left side of the guide frame (17-1); and the drive rod (17-8) slides through the groove of the drive component (17-3).

5. The paper web tension control device according to claim 1, characterized in that: The left end of the drive rod (17-8) is provided with an anti-slip limiting platform (17-9), and the outer diameter of the anti-slip limiting platform (17-9) is larger than the groove width.

6. The paper web tension control device according to claim 1, characterized in that: The movable block (10) has a boss (14) fixed on both the upper and lower sides, and the boss (14) is located on the outside of the vertical section of the support frame (2).

7. The paper web tension control device according to claim 1, characterized in that: An elastic rubber layer (15) is fitted on the outer wall of the tension roller (8).

8. A paper web tension control device according to claim 7, characterized in that: The surface of the elastic rubber layer (15) is provided with uniformly distributed anti-slip textures.

9. A paper web tension control device according to claim 1, characterized in that: The end of the lead screw (12) away from the support shaft (11) is fixed with an anti-detachment block (18), and the outer diameter of the anti-detachment block (18) is larger than the inner diameter of the hole through which the lead screw (12) passes on the moving block (10).

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