Paper pressing roller transmission device

Abstract

The present invention provides a paper pressing roller transmission device, comprising a motor, a frame, an upper paper pressing roller, a lower paper pressing roller, a paper feed platform driving shaft, and a guide block device; the upper paper pressing roller, the lower paper pressing roller, and the paper feed platform driving shaft are arranged parallel to the frame and can rotate relative to the frame; the motor is arranged on the frame to provide power for the rotation of the upper paper pressing roller, the lower paper pressing roller, and the paper feed platform driving shaft; the guide block device is arranged on the frame and connected to the upper paper pressing roller to drive the upper paper pressing roller to slide vertically along the frame. The device can realize real-time constant speed counter-rotation of the upper and lower paper pressing rollers, avoiding paper slippage and reducing paper scratches caused by it; the pressure of the upper and lower paper pressing rollers squeezing the paper is adjustable, reducing problems such as paper damage caused by excessive pressure from the upper and lower paper pressing rollers, or paper failure caused by insufficient pressure; and the upper paper pressing roller, the lower paper pressing roller, and the paper feed platform driving shaft share the same power source, and the movement law can be kept consistent.

Description

Technical Field

[0001] The invention relates to a paper conveying device, in particular to a paper pressing roller transmission device. Background Art

[0002] Existing press roller transmission devices installed in die-cutting machines all use upper and lower press rollers to press the paper, and rely on the friction between the press rollers and the paper to convey the paper. To address the common problems of warping and other issues with paper being die-cut, a connecting rod or cam is typically used to ensure that the paper can pass smoothly through the press roller. However, in these structures, the center distance between the upper and lower press rollers changes in real time, and the upper press roller is usually unpowered. This can cause excessive pressure between the upper and lower press rollers, which ultimately leads to surface collapse, or insufficient pressure between the upper and lower press rollers, which ultimately prevents paper from being conveyed. Furthermore, the different rotational speeds of the upper and lower press rollers can cause the paper to slip or be scratched. Even if a separate power source could be added to the upper press roller, the drive deviation caused by the different power sources would still cause corresponding problems caused by the different rotational speeds of the upper and lower press rollers. Summary of the Invention

[0003] The present invention aims to provide a paper pressing roller transmission device that can overcome the defects of the prior art. The purpose of the present invention is achieved through the following technical solutions.

[0004] The present invention provides a paper pressing roller transmission device, which includes:

[0005] Motor, frame, upper paper pressing roller, lower paper pressing roller, paper feed platform driving shaft, guide block device;

[0006] The upper paper pressing roller, lower paper pressing roller, and paper feed platform driving shaft are arranged parallel to the frame and can rotate relative to the frame. The motor is arranged on the frame and connected to the upper paper pressing roller, lower paper pressing roller, and paper feed platform driving shaft respectively to provide power for the rotation of the upper paper pressing roller, lower paper pressing roller, and paper feed platform driving shaft;

[0007] The guide block device is arranged on the frame and connected with the upper paper pressing roller to drive the upper paper pressing roller to slide vertically along the frame.

[0008] When the paper pressing roller transmission device is started, the upper paper pressing roller and the lower paper pressing roller rotate in opposite directions at the same linear speed, and the paper feed platform driving shaft and the lower paper pressing roller rotate in the same direction at the same linear speed. The paper in contact with the upper paper pressing roller, the lower paper pressing roller and the paper feed platform driving shaft is transported to the next process through the surface friction; when the thickness of the paper changes, the upper paper pressing roller slides vertically along the frame through the guide block device.

[0009] Preferably, the paper pressing roller transmission device also includes an upper paper pressing roller transmission device, which is connected to the upper paper pressing roller, the paper feed platform driving shaft, and the motor to drive the upper paper pressing roller and the paper feed platform driving shaft to rotate in opposite directions at equal linear speeds.

[0010] Preferably, the upper paper pressing roller transmission device in the paper pressing roller transmission device adopts synchronous belt transmission.

[0011] Preferably, the upper paper pressing roller transmission device includes an upper paper pressing roller active pulley, a first upper paper pressing roller redirecting pulley, an upper paper pressing roller driven pulley, a second upper paper pressing roller redirecting pulley, a tensioning pulley, a mounting plate, a double-sided toothed synchronous belt, and a roller;

[0012] The first upper paper pressing roller redirecting pulley, the upper paper pressing roller driven pulley, the second upper paper pressing roller redirecting pulley, the tensioning pulley, and the roller are all arranged on the mounting plate, and the roller can slide vertically up and down along the frame;

[0013] The upper paper pressing roller driving pulley, the first upper paper pressing roller redirecting pulley, the upper paper pressing roller driven pulley, the second upper paper pressing roller redirecting pulley and the tensioning pulley are connected by a double-sided toothed synchronous belt to realize synchronous belt transmission;

[0014] The upper paper pressing roller driven pulley is connected to the upper paper pressing roller, and the upper paper pressing roller active pulley drives the upper paper pressing roller to rotate through the upper paper pressing roller driven pulley; the upper paper pressing roller active pulley and the upper paper pressing roller driven pulley have the same number of teeth.

[0015] Preferably, the upper paper pressing roller transmission device further includes a first redirecting wheel shaft, a second redirecting wheel shaft, and a tensioning wheel shaft;

[0016] The first redirecting wheel shaft, the second redirecting wheel shaft, and the tensioning wheel shaft are respectively connected to the first upper paper pressing roller redirecting belt pulley, the second upper paper pressing roller redirecting belt pulley, and the tensioning belt pulley, so as to rotatably arrange the first upper paper pressing roller redirecting belt pulley, the second upper paper pressing roller redirecting belt pulley, and the tensioning belt pulley on the mounting plate;

[0017] The first redirecting wheel shaft further rotatably arranges the roller on the mounting plate, and the axis centers of the first redirecting wheel shaft, the roller and the first upper paper pressing roller redirecting pulley coincide with each other.

[0018] Preferably, the guide block device adopts a connecting rod structure to drive the upper paper pressing roller to slide vertically along the frame.

[0019] Preferably, the guide block device includes a first guide block device and a second guide block device, and the first guide block device includes a guide shaft, a guide frame, a compression spring, a slider, a connecting rod, and an active rod;

[0020] The two ends of the active rod are hinged to the frame and the connecting rod respectively, and the end of the connecting rod away from the active rod is hinged to the guide frame, and the guide frame can slide vertically along the frame;

[0021] The slider is arranged inside the guide frame and can slide up and down along the guide frame. The slider is connected to the upper paper pressing roller to drive the slider to slide up and down along the guide frame, and the upper paper pressing roller can rotate relative to the slider. One end of the guide shaft is connected to the slider. The guide shaft passes through the guide frame at the end away from the slider and extends to the upper end of the guide frame. The compression spring is installed outside the guide shaft so that the guide shaft passes through the compression spring. The compression spring can adjust the compression amount along the extension direction of the guide shaft, thereby changing the pressure between the upper paper pressing roller and the lower paper pressing roller.

[0022] The second guide block device includes a second guide shaft, a second guide frame, a second compression spring, and a second slider which are symmetrically arranged with the guide shaft, the guide frame, the compression spring, and the slider, and is used to cooperate and drive the two ends of the upper paper pressing roller to slide vertically along the frame synchronously.

[0023] Preferably, the paper pressing roller transmission device further includes a motor pulley, a driving shaft driven pulley, a motor transmission synchronous belt, and a lower paper pressing roller transmission synchronous belt;

[0024] The motor pulley is arranged at the output end of the motor and is driven to rotate by the motor. The motor pulley is connected to the driven pulley of the driving shaft through the motor transmission synchronous belt to realize synchronous belt transmission;

[0025] The driven pulley of the driving shaft and the driving pulley of the lower paper pressing roller are respectively arranged on the end of the driving shaft of the paper feeding platform close to the motor and away from the motor, so as to drive the driving shaft of the paper feeding platform to rotate;

[0026] The driven pulley of the lower paper pressing roller is connected to the lower paper pressing roller to drive the lower paper pressing roller to rotate;

[0027] The driven pulley of the lower paper pressing roller is connected to the driving pulley of the lower paper pressing roller through the lower paper pressing roller transmission synchronous belt to drive the lower paper pressing roller and the paper feeding platform driving shaft to rotate in the same direction at the same linear speed;

[0028] The motor pulley and the driven pulley of the driving shaft have the same number of teeth, and the lower paper pressing roller driving pulley and the driven pulley of the lower paper pressing roller have the same number of teeth.

[0029] Preferably, the axes of the upper paper pressing roller and the lower paper pressing roller are located in the same vertical plane.

[0030] Preferably, the paper pressing roller transmission device also includes an alarm device, which is connected to the guide block device. When more than one sheet of paper enters between the upper paper pressing roller and the lower paper pressing roller, the upper paper pressing roller together with the guide block device slides vertically upward along the frame, triggering the alarm device to send an alarm signal.

[0031] The advantages of this paper pressing roller transmission device are: it realizes real-time constant speed counter-rotation of the upper and lower paper pressing rollers, avoids paper slipping, and reduces paper scratches caused by it; the pressure of the upper and lower paper pressing rollers squeezing the paper is adjustable, which reduces problems such as paper damage caused by excessive pressure from the upper and lower paper pressing rollers, or paper transmission failure caused by too little pressure; the upper and lower paper pressing rollers and the paper feeding platform driving shaft share the same power source, and the movement law can be kept consistent, avoiding the increase of additional power input due to increasing the power of the upper paper pressing roller, reducing the deviation caused by driving different power sources, and ensuring the stability and service life of the equipment; the overall structure control logic of the device is simple and the equipment reliability is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The disclosure of the present invention will become more easily understood with reference to the accompanying drawings. Those skilled in the art will readily appreciate that these drawings are merely used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0033] Figure 1 A schematic structural diagram of a paper pressing roller transmission device according to the present invention is shown;

[0034] Figure 2 A front view of the paper pressing roller transmission device of the present invention is shown;

[0035] Figure 3 Shown Figure 1 Schematic diagram of the structure of the middle and upper paper pressing roller transmission device A;

[0036] Figure 4 Shown Figure 1 Schematic diagram of the structure of the middle guide block device B. DETAILED DESCRIPTION

[0037] Figure 1-4 The following description describes alternative embodiments of the present invention to teach those skilled in the art how to implement and reproduce the present invention. In order to teach the technical solutions of the present invention, some conventional aspects have been simplified or omitted. Those skilled in the art will understand that variations or substitutions derived from these embodiments will fall within the scope of protection of the present invention. Those skilled in the art will understand that the following features can be combined in various ways to form multiple variations of the present invention. Thus, the present invention is not limited to the following alternative embodiments, but is limited only by the claims and their equivalents.

[0038] like Figure 1 FIG. 1 is a schematic structural diagram of the paper pressing roller transmission device of the present invention. Figure 2This is a front view of the paper pressing roller transmission device of the present invention, wherein 1 is the motor, 2 is the motor base, 3 is the frame, 4 is the connecting member, 5 is the upper paper pressing roller, 6 is the lower paper pressing roller, 7 is the paper feed platform driving shaft, 8 is the motor pulley, 9 is the driving shaft driven pulley, 10 is the lower paper pressing roller driven pulley, 11 is the lower paper pressing roller driving pulley, 12 is the motor transmission timing belt, 13 is the lower paper pressing roller transmission timing belt, A is the upper paper pressing roller transmission device, and B is the guide block device. Motor 1 is mounted on the frame 3 via motor base 2. The motor 1 and motor base 2, as well as the motor base 2 and frame 3, are fixedly connected. The upper paper pressing roller transmission device A and the second guide block device B' are respectively disposed at both ends of the connecting member 4.

[0039] An upper paper pressing roller 5, a lower paper pressing roller 6, and a paper feed platform drive shaft 7 are mounted parallel to the frame 3 and are rotatable relative to the frame 3. The axes of the upper and lower paper pressing rollers 5 and 6 lie in the same vertical plane. A motor 1 is mounted on the frame 3 and connected to the upper and lower paper pressing rollers 5, 6, and the paper feed platform drive shaft 7, respectively, to provide power for the rotation of these three rollers.

[0040] The guide block device is arranged on the frame 3 and connected to the upper paper pressing roller 5 to drive the upper paper pressing roller 5 to slide vertically along the frame 3.

[0041] When the paper pressing roller transmission device is started, the upper paper pressing roller 5 and the lower paper pressing roller 6 rotate in opposite directions at equal linear speeds, and the paper feed platform driving shaft 7 and the lower paper pressing roller 6 rotate in the same direction at equal linear speeds. The paper in contact with the upper paper pressing roller 5, the lower paper pressing roller 6, and the paper feed platform driving shaft 7 is transported to the next process through the surface friction; when the thickness of the paper changes, the upper paper pressing roller 5 slides vertically along the frame 3 through the guide block device.

[0042] like Figure 3 As shown, Figure 1 Schematic diagram of the structure of the upper paper pressing roller transmission device A in the middle. The upper paper pressing roller transmission device A adopts synchronous belt drive. The upper paper pressing roller transmission device A is connected to the upper paper pressing roller 5, the paper feed platform driving shaft 7, and the motor 1 to drive the upper paper pressing roller 5 and the paper feed platform driving shaft 7 to rotate in opposite directions at equal linear speeds. Figure 3 Among them, A1 is the upper paper pressing roller active pulley, A2 is the first upper paper pressing roller redirecting pulley, A3 is the upper paper pressing roller driven pulley, A4 is the second upper paper pressing roller redirecting pulley, A5 is the tensioning pulley, A6 is the first redirecting pulley shaft, A7 is the second redirecting pulley shaft, A8 is the tensioning pulley shaft, A9 is the mounting plate, A10 is the double-sided toothed synchronous belt, and A11 is the roller.

[0043] Among them, the first upper paper pressing roller redirecting pulley A2, the upper paper pressing roller driven pulley A3, the second upper paper pressing roller redirecting pulley A4, the tensioning pulley A5, and the roller A11 are all arranged on the mounting plate A9, wherein the first redirecting wheel shaft A6, the second redirecting wheel shaft A7, and the tensioning wheel shaft A8 are respectively connected to the first upper paper pressing roller redirecting pulley A2, the second upper paper pressing roller redirecting pulley A4, and the tensioning pulley A5, and the first upper paper pressing roller redirecting pulley A2, the second upper paper pressing roller redirecting pulley A4, and the tensioning pulley A5 are rotatably arranged on the mounting plate A9; the first redirecting wheel shaft A6 also rotatably arranges the roller A11 on the mounting plate A9, and the axial center lines of the first redirecting wheel shaft A6, the roller A11, and the first upper paper pressing roller redirecting pulley A2 coincide, and the roller A11 can slide vertically up and down along the frame 3.

[0044] The upper paper pressing roller driving pulley A1, the first upper paper pressing roller redirecting pulley A2, the upper paper pressing roller driven pulley A3, the second upper paper pressing roller redirecting pulley A4 and the tensioning pulley A5 are connected by a double-sided toothed synchronous belt A10 to realize synchronous belt transmission, thereby driving the upper paper pressing roller 5 and the paper feed platform driving shaft 7 to rotate in opposite directions at equal linear speeds.

[0045] The upper paper pressing roller driven pulley A3 is connected to the upper paper pressing roller 5, and the upper paper pressing roller active pulley A1 drives the upper paper pressing roller 5 to rotate through the upper paper pressing roller driven pulley A3; the upper paper pressing roller active pulley A1 and the upper paper pressing roller driven pulley A3 have the same number of teeth.

[0046] like Figure 4 As shown, Figure 1 The structural diagram of the first guide block device B is shown in FIG. Here, the guide block device is arranged on the frame 3 and adopts a connecting rod structure to drive the upper paper pressing roller 5 to slide vertically along the frame 3. Figure 4 In the figure, B1 is the guide shaft, B2 is the guide frame, B3 is the compression spring, B4 is the slider, B5 is the connecting rod, and B6 is the active rod.

[0047] The two ends of the active rod B6 are hinged to the frame 3 and the connecting rod B5 respectively. The end of the connecting rod B5 away from the active rod B6 is hinged to the guide frame B2. The guide frame B2 can slide vertically along the frame 3.

[0048] The slider B4 is arranged inside the guide frame B2 and can slide up and down along the guide frame B2. The slider B4 is connected to the upper paper pressing roller 5 to drive the slider B4 to slide up and down along the guide frame B2, and the upper paper pressing roller 5 can rotate relative to the slider B4; one end of the guide shaft B1 is connected to the slider B4, and the end of the guide shaft B1 away from the slider B4 passes through the guide frame B2 and extends to the upper end of the guide frame B2. The compression spring B3 is installed on the outside of the guide shaft B1 so that the guide shaft B1 passes through the compression spring B3. The compression spring B3 can adjust the compression amount along the extension direction of the guide shaft B1, thereby changing the pressure between the upper paper pressing roller 5 and the lower paper pressing roller 6.

[0049] Correspondingly, the second guide block device B' includes a second guide shaft, a second guide frame, a second compression spring, and a second slider, which are symmetrically arranged with the guide shaft B1, the guide frame B2, the compression spring B3, and the slider B4, respectively, to cooperate and drive the two ends of the upper paper pressing roller 5 to slide vertically along the frame 3 synchronously.

[0050] like Figure 1-4 As shown, the motor pulley 8 is arranged at the output end of the motor 1 and is driven to rotate by the motor 1. The motor pulley 8 is connected to the driving shaft driven pulley 9 via the motor transmission synchronous belt 12 to realize synchronous belt transmission. The driving shaft driven pulley 9 and the lower paper pressing roller driving pulley 11 are respectively arranged on the paper feed platform driving shaft 7 close to the motor 1 and away from the motor 1, respectively, to drive the paper feed platform driving shaft 7 to rotate. The lower paper pressing roller driven pulley 10 is connected to the lower paper pressing roller 6 to drive the lower paper pressing roller 6 to rotate. The lower paper pressing roller driven pulley 10 is connected to the lower paper pressing roller driving pulley 11 via the lower paper pressing roller transmission synchronous belt 13 to drive the lower paper pressing roller 6 and the paper feed platform driving shaft 7 to rotate in the same direction at equal linear speed. Among them, the motor pulley 8 and the driving shaft driven pulley 9 have the same number of teeth, and the lower paper pressing roller driving pulley 11 and the lower paper pressing roller driven pulley 10 have the same number of teeth.

[0051] The paper pressing roller transmission device of the present invention is also provided with an alarm device, which is connected to the guide block device B. When more than one sheet of paper enters between the upper paper pressing roller 5 and the lower paper pressing roller 6, the upper paper pressing roller 5 together with the guide block device B slides vertically upward along the frame 3, triggering the alarm device to send an alarm signal.

[0052] After the paper pressing roller transmission device of the present invention is started, the motor 1 drives the paper feed platform driving shaft 7 to rotate via the motor drive synchronous belt 12. The paper feed platform driving shaft 7 drives the lower paper pressing roller 6 to rotate via the lower paper pressing roller drive synchronous belt 13. The paper feed platform driving shaft 7 drives the upper paper pressing roller 5 to rotate via the double-sided toothed synchronous belt A10. The upper paper pressing roller 5 and the lower paper pressing roller 6 rotate at the same speed. The active rod B6 drives the guide frame B2 to move up and down via the connecting rod B5. The compression spring B3 is in a compressed state. The slider B4 moves up and down simultaneously with the guide frame B2 under the action of the compression spring B3. The upper paper pressing roller 5 moves up and down with the slider B4. After the upper paper pressing roller 5 moves downward to a preset position, it can rotate in the opposite direction with the lower paper pressing roller 6 to feed the paper to the next process. When two sheets of paper enter the middle of the upper paper pressing roller 5 and the lower paper pressing roller 6 at the same time, the upper paper pressing roller 5 moves upward to squeeze the compression spring B3, and the system alarm is triggered.

[0053] The tensioning pulley shaft A8 is an eccentric structure. During installation, the tensioning pulley shaft A8 can be rotated to tighten the double-sided toothed synchronous belt A10. The upper paper pressing roller 5 can drive the mounting plate A9 to move up and down synchronously. During the up and down movement, the spacing between the upper paper pressing roller redirecting pulley A2, the upper paper pressing roller driven pulley A3, the upper paper pressing roller redirecting pulley A4 and the tensioning pulley A5 remains unchanged, the full length of the double-sided toothed synchronous belt A10 remains basically unchanged, and the upper paper pressing roller active pulley A1 and the upper paper pressing roller driven pulley A3 maintain constant speed reversal.

[0054] It should be appreciated that although the foregoing description has been made by way of example of the present invention, such and other modifications and variations that will be apparent to those skilled in the art are to be considered within the broad scope of the invention as set forth herein. Therefore, although the invention has been described with reference to preferred embodiments, it is not intended that the novel device be limited thereby, but rather that it encompasses various modifications and equivalents that fall within the broad scope of the foregoing disclosure and claims.

Claims

1. A paper pressing roller transmission device, characterized in that: include: Motor (1), frame (3), upper paper pressing roller (5), lower paper pressing roller (6), paper feeding platform driving shaft (7), guide block device; The upper paper pressing roller (5), the lower paper pressing roller (6), and the paper feed platform driving shaft (7) are arranged in parallel on the frame (3) and can rotate relative to the frame (3); the motor (1) is arranged on the frame (3) and is connected to the upper paper pressing roller (5), the lower paper pressing roller (6), and the paper feed platform driving shaft (7) respectively, so as to provide power for the rotation of the upper paper pressing roller (5), the lower paper pressing roller (6), and the paper feed platform driving shaft (7); The guide block device is arranged on the frame (3) and is connected to the upper paper pressing roller (5) to drive the upper paper pressing roller (5) to slide vertically along the frame (3); When the paper pressing roller transmission device is started, the upper paper pressing roller (5) and the lower paper pressing roller (6) rotate in opposite directions at an equal linear speed, and the paper feed platform driving shaft (7) and the lower paper pressing roller (6) rotate in the same direction at an equal linear speed, and the paper in contact with the upper paper pressing roller (5), the lower paper pressing roller (6) and the paper feed platform driving shaft (7) is transported to the next process through the surface friction; when the thickness of the paper changes, the upper paper pressing roller (5) slides vertically along the frame (3) through the guide block device; The guide block device adopts a connecting rod structure to drive the upper paper pressing roller (5) to slide vertically along the frame (3); The guide block device includes a first guide block device (B) and a second guide block device (B'), wherein the first guide block device (B) includes a guide shaft (B1), a guide frame (B2), a compression spring (B3), a slider (B4), a connecting rod (B5), and an active rod (B6); The two ends of the active rod (B6) are respectively hinged to the frame (3) and the connecting rod (B5); the end of the connecting rod (B5) away from the active rod (B6) is hinged to the guide frame (B2); and the guide frame (B2) can slide vertically along the frame (3); The slider (B4) is arranged inside the guide frame (B2) and can slide up and down along the guide frame (B2). The slider (B4) is connected to the upper paper pressing roller (5) to drive the slider (B4) to slide up and down along the guide frame (B2). The upper paper pressing roller (5) can rotate relative to the slider (B4); one end of the guide shaft (B1) is connected to the slider (B4); the end of the guide shaft (B1) away from the slider (B4) passes through the guide frame (B2) and extends to the upper end of the guide frame (B2); the compression spring (B3) is installed outside the guide shaft (B1) so that the guide shaft (B1) passes through the compression spring (B3); the compression spring (B3) can adjust the compression amount along the extension direction of the guide shaft (B1); The second guide block device (B') comprises a second guide shaft, a second guide frame, a second compression spring, and a second slider, which are symmetrically arranged with respect to the guide shaft (B1), the guide frame (B2), the compression spring (B3), and the slider (B4), and is used to cooperate and drive the two ends of the upper paper pressing roller (5) to slide vertically along the frame (3) synchronously.

2. The paper pressing roller transmission device according to claim 1, wherein: The invention also includes an upper paper pressing roller transmission device (A), which is connected to the upper paper pressing roller (5), the paper feeding platform driving shaft (7), and the motor (1) to drive the upper paper pressing roller (5) and the paper feeding platform driving shaft (7) to rotate in opposite directions at an equal linear speed.

3. The paper pressing roller transmission device according to claim 2, wherein: The upper paper pressing roller transmission device (A) adopts synchronous belt transmission.

4. The paper pressing roller transmission device according to claim 3, wherein: The upper paper pressing roller transmission device (A) comprises an upper paper pressing roller driving pulley (A1), a first upper paper pressing roller redirecting pulley (A2), an upper paper pressing roller driven pulley (A3), a second upper paper pressing roller redirecting pulley (A4), a tensioning pulley (A5), a mounting plate (A9), a double-sided toothed synchronous belt (A10), and a roller (A11); The first upper paper pressing roller redirecting pulley (A2), the upper paper pressing roller driven pulley (A3), the second upper paper pressing roller redirecting pulley (A4), the tensioning pulley (A5), and the roller (A11) are all arranged on the mounting plate (A9), and the roller (A11) can slide vertically up and down along the frame (3); The upper paper pressing roller driving pulley (A1), the first upper paper pressing roller redirecting pulley (A2), the upper paper pressing roller driven pulley (A3), the second upper paper pressing roller redirecting pulley (A4) and the tensioning pulley (A5) are connected by a double-sided toothed synchronous belt (A10) to realize synchronous belt transmission; The upper paper pressing roller driven pulley (A3) is connected to the upper paper pressing roller (5), and the upper paper pressing roller active pulley (A1) drives the upper paper pressing roller (5) to rotate through the upper paper pressing roller driven pulley (A3); the upper paper pressing roller active pulley (A1) and the upper paper pressing roller driven pulley (A3) have the same number of teeth.

5. The paper pressing roller transmission device according to claim 4, characterized in that: The upper paper pressing roller transmission device (A) further comprises a first redirecting wheel shaft (A6), a second redirecting wheel shaft (A7), and a tensioning wheel shaft (A8); The first redirecting wheel shaft (A6), the second redirecting wheel shaft (A7), and the tensioning wheel shaft (A8) are respectively connected to the first upper paper pressing roller redirecting pulley (A2), the second upper paper pressing roller redirecting pulley (A4), and the tensioning pulley (A5), so as to rotatably arrange the first upper paper pressing roller redirecting pulley (A2), the second upper paper pressing roller redirecting pulley (A4), and the tensioning pulley (A5) on the mounting plate (A9); The first redirecting wheel shaft (A6) further rotatably arranges the roller (A11) on the mounting plate (A9); the axis lines of the first redirecting wheel shaft (A6), the roller (A11), and the first upper paper pressing roller redirecting pulley (A2) coincide with each other.

6. The paper pressing roller transmission device according to claim 1, wherein: It also includes a motor pulley (8), a driving shaft driven pulley (9), a motor transmission synchronous belt (12), and a lower paper pressing roller transmission synchronous belt (13); The motor pulley (8) is arranged at the output end of the motor (1) and is driven to rotate by the motor (1); the motor pulley (8) and the driven pulley (9) of the driving shaft are connected through the motor transmission synchronous belt (12) to realize synchronous belt transmission; The driving shaft driven pulley (9) and the lower paper pressing roller driving pulley (11) are respectively arranged on one end of the paper feed platform driving shaft (7) close to the motor (1) and one end away from the motor (1), so as to drive the paper feed platform driving shaft (7) to rotate; The lower paper pressing roller driven pulley (10) is connected to the lower paper pressing roller (6) to drive the lower paper pressing roller (6) to rotate; The lower paper pressing roller driven pulley (10) is connected to the lower paper pressing roller driving pulley (11) via the lower paper pressing roller transmission synchronous belt (13) to drive the lower paper pressing roller (6) and the paper feeding platform driving shaft (7) to rotate in the same direction at an equal linear speed; The motor pulley (8) and the driving shaft driven pulley (9) have the same number of teeth, and the lower paper pressing roller driving pulley (11) and the lower paper pressing roller driven pulley (10) have the same number of teeth.

7. The paper pressing roller transmission device according to claim 1, wherein: The axes of the upper paper pressing roller (5) and the lower paper pressing roller (6) are located in the same vertical plane.

8. The paper pressing roller transmission device according to claim 1, wherein: The machine also includes an alarm device connected to the guide block device (B). When more than one sheet of paper enters between the upper paper pressing roller (5) and the lower paper pressing roller (6), the upper paper pressing roller (5) together with the guide block device (B) slides vertically upward along the frame (3), triggering the alarm device to emit an alarm signal.

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