Large-strip transparent paper quick-change pneumatic tensioning device

Abstract

The utility model relates to a large-strip transparent paper quick-change pneumatic tensioning device which comprises a supporting plate, a rotating body, a supporting sleeve and a roll shaft, a tensioning mechanism is installed on the supporting sleeve and used for tensioning or loosening a transparent paper disc, the supporting sleeve is connected with the rotating body, the rotating body is installed on the supporting plate in a rotating mode, and the roll shaft is connected with the rotating body. A brake disc is installed on the rotating body, a brake swing rod is arranged on one side of the brake disc, the middle of the brake swing rod is installed on the roller shaft in a hinged mode, the roller shaft is installed on the supporting plate, a first adjusting mechanism is arranged on one side of the lower end of the brake swing rod, and a driving mechanism is arranged on the other side of the lower end of the brake swing rod. The driving mechanism is matched with the first adjusting mechanism to be used for driving the brake swing rod to loosen or brake the brake disc. The tensioning mechanism can automatically tension or loosen the transparent paper plate, the transparent paper plate can be quickly replaced, the replacement efficiency is improved, and the labor intensity is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field, and particularly relates to a pneumatic tensioning device for quick replacement of large strips of transparent paper. Background Art

[0002] The original machine parts for tensioning large strips of transparent paper in existing packaging machines use the screwing in or out of screws and nuts to clamp or loosen the transparent paper. In its working process, the transparent paper support is lifted down by hand, the handle is pushed counterclockwise, and the locking disc will drive the nut to screw out (the stroke of the nut's screwing in / out is about 50 - 60 mm). The used large strip of transparent paper core is taken out, a new large strip of transparent paper is installed, then the locking disc is installed, the handle is pushed clockwise by hand, the locking disc will drive the nut to screw in, and the transparent paper is clamped. Then the transparent paper support is lifted onto the equipment rack. Since the large strip of transparent paper is relatively heavy, about 18.2 Kg, the labor intensity of the operator for loading and unloading is relatively large, the time required to replace a transparent paper is relatively long, and it is not very convenient for female workers to operate this locking method, and the problem of the locking disc loosening easily occurs.

[0003] In view of this shortcoming, each manufacturer has made improvements. Some manufacturers have changed to automatic loading and unloading pneumatic tensioning, but the structure is too complex; and the braking part uses electromagnetic braking, which is not convenient for maintenance and adjustment. Content of the Utility Model

[0004] The utility model aims at the existing technical problems and provides a pneumatic tensioning device for quick replacement of large strips of transparent paper.

[0005] The technical solution for the utility model to solve the above technical problems is as follows: A pneumatic tensioning device for quick replacement of large strips of transparent paper, including a support plate, a rotating body, a support sleeve and a roller shaft. A tensioning mechanism is installed on the support sleeve, and the tensioning mechanism is used to tension or loosen the transparent paper disk. The support sleeve is connected to the rotating body, the rotating body is rotatably installed on the support plate, a brake disc is installed on the rotating body, a brake swing rod is arranged on one side of the brake disc, the middle part of the brake swing rod is hinged and installed on the roller shaft, the roller shaft is installed on the support plate, a first adjusting mechanism is arranged on one side of the lower end of the brake swing rod, and a driving mechanism is arranged on the other side. The driving mechanism cooperates with the first adjusting mechanism to drive the brake swing rod to loosen or brake the brake disc.

[0006] Based on the above technical solution, the utility model can also be improved as follows:

[0007] Preferably, the driving mechanism includes a long shaft, a rocker arm and a cam. A plurality of paper rollers are installed at the upper end of the rocker arm, the lower end of the rocker arm is rotatably installed on the long shaft, the long shaft is installed on the support plate, and the cam is installed at the end of the rocker arm and the cam is adjacent to the brake swing rod.

[0008] Preferably, the first adjusting mechanism includes a support plate, an adjusting bolt, a compression spring, and a locking nut. One end of the support plate is mounted on the support plate, and the other end is provided with a mounting hole. The adjusting bolt is mounted in the mounting hole through the locking nut. One end of the compression spring is sleeved on the adjusting bolt, and the other end is located in the positioning groove at the lower end of the brake swing rod.

[0009] Preferably, a second adjusting mechanism is further included. The second adjusting mechanism includes a tension spring, a fixed block, and an adjusting screw. The fixed block is mounted on the support plate, the adjusting screw is mounted on the fixed block, one end of the tension spring is connected to the adjusting screw, and the other end is connected to the side of the rocker arm close to the support plate.

[0010] Preferably, a support shaft is mounted at the lower end of the brake swing rod, and a roller is rotatably mounted on the support shaft. The cam corresponds to the roller.

[0011] Preferably, the tensioning mechanism includes a tensioning block, a cylinder, a support rod, a sliding block, and an adjusting block. The support rod is coaxially arranged in the support sleeve. A plurality of axially extending long slots are provided on the support sleeve, and the plurality of long slots are evenly arranged along the circumferential direction of the support sleeve. The sliding block is slidably arranged in the long slot, and the tensioning block is mounted on the sliding block. One end of the adjusting block is hinged to the sliding block through a first positioning pin, and the other end is coaxially hinged to the support sleeve and the support rod through a second positioning pin. A radial slot for accommodating the adjusting block is provided on the support rod, and the piston rod of the cylinder is used to drive the sliding block to move.

[0012] Preferably, an adjusting assembly is mounted at the end of the support sleeve. The adjusting assembly includes an adjusting bolt and a return spring. The return spring is sleeved on the adjusting bolt, and the return spring is used to drive the sliding block to reset.

[0013] Preferably, a fine-tuning mechanism is further included. The fine-tuning mechanism includes a flange sleeve, a shaft sleeve, and a fine-tuning shaft sleeve. The flange sleeve is mounted on the support plate. The rotating body is rotatably connected to the flange sleeve through a bearing. The outer side of the fine-tuning shaft sleeve is rotatably connected to the flange sleeve through a bearing, and the inner side is connected to the shaft sleeve through a thread. The shaft sleeve and the cylinder are mounted on the cylinder seat. An axial through hole for the piston rod of the cylinder to pass through is provided in the shaft sleeve.

[0014] Preferably, a positioning bolt is mounted on the flange sleeve, and a corresponding positioning groove is provided on the outer wall of the shaft sleeve. The positioning groove extends along the length direction of the shaft sleeve.

[0015] Preferably, a brake pad is provided at the upper end of the brake swing rod, and the shape of the brake pad corresponds to the outer edge of the brake disc.

[0016] The beneficial effects of the present utility model are as follows: The automatic tensioning or loosening of the transparent paper disk is realized through the tensioning mechanism, enabling the rapid replacement of the transparent paper disk, reducing the operation difficulty and labor intensity. Moreover, through the cooperation of the driving mechanism and the adjusting mechanism, the brake swing rod is driven to rotate clockwise or counterclockwise, achieving the braking or releasing of the brake disk, thereby realizing the stopping or releasing of the transparent paper disk, further improving the convenience of using the transparent paper, enhancing the replacement efficiency of the transparent paper, with a simple structure and convenient adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional schematic diagram of the present utility model Figure 1 ;

[0018] Figure 2 is a three-dimensional schematic diagram of the present utility model Figure 2 ;

[0019] Figure 3 is a three-dimensional schematic diagram of the present utility model Figure 3 ;

[0020] Figure 4 is a cross-sectional schematic diagram of the tensioning mechanism of the present utility model;

[0021] Figure 5 is Figure 4 a partial enlarged schematic diagram at position A in

[0022] Figure 6 is Figure 4 a partial enlarged schematic diagram at position B in

[0023] The reference numerals are recorded as follows: 1, support plate; 2, flange sleeve; 3, brake disk; 4, rotating body; 5, support sleeve; 6, tensioning block; 7, bushing; 8, fine-tuning bushing; 9, cylinder seat; 10, cylinder; 10.1, piston rod; 10.2, push block; 11, brake swing rod; 12, long shaft; 13, cam; 14, rocker arm; 15, tension spring; 16, fixed block; 17, adjusting screw; 18, roller shaft; 19, support plate; 20, adjusting bolt; 21, compression spring; 22, lock nut; 23, support plate; 24, paper roller; 25, support rod; 26, sliding block; 27, adjusting block; 28, first positioning pin; 29, second positioning pin; 30, adjusting bolt; 31, return spring; 32, support shaft; 33, first positioning sleeve; 34, second positioning sleeve; 35, positioning bolt; 36, flange plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The principles and features of the present utility model will be described below with reference to the accompanying drawings. The examples given are only for explaining the present utility model and are not intended to limit the scope of the present utility model.

[0025] As Figures 1 to 6As shown in the figure, the utility model discloses a pneumatic tensioning device for quick replacement of large strip transparent paper, which includes a support plate 1, a rotating body 4, a support sleeve 5 and a roller shaft 18. A tensioning mechanism is installed on the support sleeve 5, and the tensioning mechanism is used to tension or loosen the transparent paper disk. The support sleeve 5 is connected to the rotating body 4, and the rotating body 4 is rotatably installed on the support plate 1. A brake disc 3 is installed on the rotating body 4. A brake swing rod 11 is arranged on one side of the brake disc 3. The middle part of the brake swing rod 11 is hinged and installed on the roller shaft 18. The roller shaft 18 is installed on the support plate 1. A first adjustment mechanism is arranged on one side of the lower end of the brake swing rod 11, and a driving mechanism is arranged on the other side. The driving mechanism cooperates with the first adjustment mechanism to drive the brake swing rod 11 to loosen or brake the brake disc 3. By the cooperation of the first adjustment mechanism and the driving mechanism to drive the brake swing rod 11 to swing, the brake disc 3 is loosened or braked, so as to realize the stop release or release of the transparent paper of the transparent paper disk. The overall structure is simple, the maintenance and adjustment are convenient, and the convenience of using the transparent paper and the replacement efficiency are improved.

[0026] Specifically, the driving mechanism includes a long shaft 12, a rocker arm 14 and a cam 13. A plurality of paper rollers 24 are installed at the upper end of the rocker arm 14. The lower end of the rocker arm 14 is rotatably installed on the long shaft 12. The long shaft 12 is installed on the support plate 1. The cam 13 is installed at the end of the rocker arm 14 and the cam 13 is adjacent to the lower part of the brake swing rod 11.

[0027] When pulling the transparent paper on the transparent paper disk through the paper roller 24, the pulling force of the transparent paper is relatively large, driving the rocker arm 14 to rotate clockwise around the long shaft 12, driving the cam 13 to rotate towards the brake swing rod 11, so as to overcome the force of the first adjustment mechanism to squeeze the brake swing rod 11 to rotate counterclockwise around the roller shaft 18. The upper end of the brake swing rod 11 leaves the brake disc 3, and the brake disc 3, the rotating body 4 and the support sleeve 5 can rotate normally. The transparent paper disk on the support sleeve 5 starts to rotate and release the transparent paper; when not pulling the transparent paper, the pulling force of the transparent paper becomes smaller, the rocker arm 14 rotates counterclockwise, driving the cam 13 to leave the brake swing rod 11. Under the lever action, the upper end of the brake swing rod 11 contacts the brake disc 3, realizing the braking of the brake disc 3. The brake disc 3 and the support sleeve 5 cannot rotate, so as to stop releasing the transparent paper disk. The first adjustment mechanism ensures that the brake swing rod 11 can be in close contact with the brake disc 3, ensuring the braking effect on the brake disc 3.

[0028] Furthermore, a brake pad is arranged at the upper end of the brake swing rod 11, and the shape of the brake pad corresponds to the outer edge of the brake disc 3. The braking effect on the brake disc 3 is improved, so as to ensure that the release of the transparent paper can be stopped.

[0029] Furthermore, the brake pad is detachably installed on the brake swing rod 11. According to the wear condition of the brake pad, the brake pad is replaced, improving the service life of the tensioning device.

[0030] Further, a support shaft 32 is installed at the lower end of the brake swing rod 11, and a roller is rotatably installed on the support shaft 32, and the cam 13 corresponds to the roller. It can not only drive the brake swing rod 11 to rotate, but also avoid jamming, ensuring that the transparent paper can be normally released.

[0031] In this embodiment, specifically, the first adjustment mechanism includes a support plate 19, an adjustment bolt 20, a compression spring 21 and a locking nut 22. One end of the support plate 19 is installed on the support plate 1, and the other end is provided with a mounting hole. The adjustment bolt 20 is installed in the mounting hole through the locking nut 22. One end of the compression spring 21 abuts against the adjustment bolt 20, and the other end is located in the positioning groove at the lower end of the brake swing rod 11. The positioning groove is arranged on the side away from the cam 13. The end of the adjustment bolt 20 is provided with a receiving groove, and the end of the compression spring 21 is located in the receiving groove, further limiting the compression spring 21 to ensure normal expansion and contraction. Loosening the locking nut 22 can adjust the pre-tightening force of the compression spring 21 by rotating the adjustment bolt 20, and adjust the pressure value of the compression spring 21 on the brake swing rod 11, so as to control the pressure when the brake swing rod 11 brakes the brake disc 3 and meet the release requirements of different transparent papers. In addition, when the pulling force on the transparent paper becomes smaller, the compression spring 21 can drive the brake swing rod 11 to rotate counterclockwise, ensuring the braking effect on the brake disc 3 and realizing the stop of releasing the transparent paper.

[0032] The large strip transparent paper quick-change pneumatic tensioning device further includes a second adjustment mechanism. The second adjustment mechanism is located on the side away from the brake swing rod 11. The second adjustment mechanism includes a tension spring 15, a fixed block 16 and an adjustment screw 17. The fixed block 16 is installed on the support plate 1, the adjustment screw 17 is installed on the fixed block 16, one end of the tension spring 15 is connected to the adjustment screw 17, and the other end is connected to the side of the swing arm 14 close to the support plate 1. Rotating the adjustment screw 17 can adjust the pulling force of the tension spring 15, which can adjust the pulling force for pulling the swing arm 14 to rotate, that is, adjust the pulling force received by the transparent paper disc when releasing the transparent paper, ensuring that the transparent paper can be normally released. And when the pulling force on the transparent paper becomes smaller, the tension spring 15 can pull the swing arm 14 to rotate counterclockwise around the long shaft 12.

[0033] In this embodiment, the tensioning mechanism includes a tensioning block 6, a cylinder 10, a support rod 25, a sliding block 26 and an adjusting block 27. The support rod 25 is coaxially arranged in the support sleeve 5. The support sleeve 5 is provided with a plurality of axially extending long grooves, and the plurality of long grooves are evenly arranged along the circumferential direction of the support sleeve 5. The sliding block 26 is slidably arranged in the long groove, and the tensioning block 6 is installed on the sliding block 26. One end of the adjusting block 27 is hinged to the sliding block 26 through a first positioning pin 28, and the other end is coaxially hinged to the support sleeve 5 and the support rod 25 through a second positioning pin 29. The support rod 25 is provided with a radial groove for accommodating the adjusting block 27, and the position of the radial groove corresponds to the position of the long groove. The length of the radial groove is greater than the width of the adjusting block 27 to ensure that the adjusting block 27 can rotate around the second positioning pin 29 normally. The piston rod 10.1 of the cylinder 10 is used to drive the sliding block 26 to move. Specifically, a push block 10.2 is installed at the end of the piston rod 10.1, and a ring-shaped protrusion is provided on the side of the push block 10.2 close to the sliding block 26. The piston rod 10.1 pushes the sliding block 26 to move through the ring-shaped protrusion. The ring-shaped protrusion structure can prevent the push block 10.2 from interfering with the support rod 25 and ensure that the sliding block 26 can move normally.

[0034] Furthermore, a support plate 23 is installed on the support plate 1, and a control valve is installed on the support plate 23. The control valve is electrically connected to the cylinder 10. By controlling the working state of the cylinder 10 through the control valve, the operation is simple.

[0035] Furthermore, an adjusting assembly is installed at the end of the support sleeve 5. The adjusting assembly includes an adjusting bolt 30 and a return spring 31. The return spring 31 is sleeved on the adjusting bolt 30, and the return spring 31 is used to drive the sliding block 26 to reset. Specifically, one end of the adjusting bolt 30 is inserted into the first positioning sleeve 33, and the first positioning sleeve 33 is installed on the support sleeve 5 by threads. The other end of the adjusting bolt 30 is threadedly connected to the second positioning sleeve 34. The return spring 31 is located on the adjusting bolt 30 between the first positioning sleeve 33 and the second positioning sleeve 34. A protrusion corresponding to the second positioning sleeve 34 is provided on the sliding block 26 to ensure that the sliding block 26 can automatically reset.

[0036] By rotating the control valve installed on the support plate 23, the air cylinder 10 is ventilated. The piston rod 10.1 of the air cylinder 10 overcomes the elastic force of the return spring 31, and through the push block 10.2, it pushes the sliding block 26 and the tensioning block 6 to move forward. Among them, the end where the adjusting component is located is the front end, thereby driving the adjusting block 27 to rotate around the second positioning pin 29. The adjusting block 27 is adjusted from the radial state to the inclined state, realizing the radial retraction of the tensioning block 6, loosening the transparent paper disk sleeved on the support sleeve 5, and facilitating the operator to remove the transparent paper disk. After installing a new transparent paper disk on the support sleeve 5, rotate the control valve in the reverse direction to cut off the air supply to the air cylinder 10. The piston rod 10.1 no longer applies force to the sliding block 26. The sliding block 26 moves backward under the action of the return spring 31, driving the adjusting block 27 to rotate reversely around the second positioning pin 29. The adjusting block 27 is adjusted from the inclined state to the radial state, thereby driving the tensioning block 6 to move backward and outward, realizing the radial extension of the tensioning block 6, tightening the inner hole of the transparent paper disk, and realizing the fixation of the tensioning paper disk. The overall operation is simple, improving the convenience of replacing the transparent paper disk and reducing the labor intensity.

[0037] The large strip transparent paper quick-change pneumatic tensioning device further includes a fine-tuning mechanism. The fine-tuning mechanism includes a flange sleeve 2, a shaft sleeve 7, and a fine-tuning shaft sleeve 8. The flange sleeve 2 is installed on the support plate 1 through a flange 36. The outer side of the rotating body 4 is rotatably connected to the flange sleeve 2 through a bearing, that is, the rotating body 4 is rotatably installed on the support plate 1 through the flange sleeve 2. The inner side of the rotating body 4 is connected to the shaft sleeve 7 through another bearing. The outer side of the fine-tuning shaft sleeve 8 is connected to the flange sleeve 2 through a bearing, and the inner side of the fine-tuning shaft sleeve 8 is connected to the shaft sleeve 7 through a thread. The shaft sleeve 7 and the air cylinder 10 are installed on the air cylinder seat 9, and an axial through hole for the piston rod 10.1 of the air cylinder 10 to pass through is provided in the shaft sleeve 7 to ensure that the piston rod 10.1 can move normally. A plurality of handles are provided circumferentially on the fine-tuning shaft sleeve 8 to facilitate the rotation of the fine-tuning shaft sleeve 8. Since the fine-tuning shaft sleeve 8 is installed on the flange sleeve 2 through a bearing, when the fine-tuning shaft sleeve 8 is rotated, the fine-tuning shaft sleeve 8 will not move. The fine-tuning shaft sleeve 8 drives the shaft sleeve 7 to move through the thread. Since the shaft sleeve 7 is connected to the rotating body 4, the rotating body 4, the brake disc 3, and the support sleeve 5 are driven to move, thereby driving the transparent paper disk installed on the support sleeve 5 to move back and forth, achieving the function of adjusting the position of the transparent paper back and forth.

[0038] Further, a positioning bolt 35 is installed on the flange sleeve 2, and a corresponding positioning groove is provided on the outer wall of the shaft sleeve 7. The positioning groove extends along the length direction of the shaft sleeve 7. The end of the positioning bolt 35 is inserted into the positioning groove through the gap between the fine-tuning shaft sleeve 8 and the rotating body 4. Through the cooperation of the positioning bolt 35 and the positioning groove, it is ensured that the shaft sleeve 7 can move normally without rotating, ensuring that the position of the support sleeve 5 and the transparent paper disk can be adjusted normally.

[0039] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A large-strip transparent paper quick-change pneumatic tensioning device, characterized in that, It includes a support plate (1), a rotating body (4), a support sleeve (5) and a roller shaft (18). A tensioning mechanism is installed on the support sleeve (5), and the tensioning mechanism is used to tension or loosen the transparent paper roll. The support sleeve (5) is connected to the rotating body (4), and the rotating body (4) is rotatably installed on the support plate (1). A brake disc (3) is installed on the rotating body (4). A brake swing rod (11) is arranged on one side of the brake disc (3). The middle part of the brake swing rod (11) is hinged and installed on the roller shaft (18). The roller shaft (18) is installed on the support plate (1). A first adjusting mechanism is arranged on one side of the lower end of the brake swing rod (11), and a driving mechanism is arranged on the other side. The driving mechanism cooperates with the first adjusting mechanism to drive the brake swing rod (11) to loosen or brake the brake disc (3).

2. The large strip transparent paper quick-change pneumatic tensioning device according to claim 1, characterized in that, The driving mechanism includes a long shaft (12), a rocker arm (14) and a cam (13). A plurality of paper rollers (24) are installed at the upper end of the rocker arm (14). The lower end of the rocker arm (14) is rotatably installed on the long shaft (12). The long shaft (12) is installed on the support plate (1). The cam (13) is installed at the end of the rocker arm (14) and the cam (13) is adjacent to the brake swing rod (11).

3. The large-strip transparent paper quick-change pneumatic tensioning device according to claim 2, characterized in that, The first adjusting mechanism includes a support plate (19), an adjusting bolt (20), a compression spring (21) and a locking nut (22). One end of the support plate (19) is installed on the support plate (1), and the other end is provided with an installation hole. The adjusting bolt (20) is installed in the installation hole through the locking nut (22). One end of the compression spring (21) abuts against the adjusting bolt (20), and the other end is located in the positioning groove at the lower end of the brake swing rod (11).

4. The large strip transparent paper quick-change pneumatic tensioning device according to claim 3, wherein, It further includes a second adjusting mechanism. The second adjusting mechanism includes a tension spring (15), a fixed block (16) and an adjusting screw rod (17). The fixed block (16) is installed on the support plate (1). The adjusting screw rod (17) is installed on the fixed block (16). One end of the tension spring (15) is connected to the adjusting screw rod (17), and the other end is connected to the side of the rocker arm (14) close to the support plate (1).

5. The large-strip transparent paper quick-change pneumatic tensioning device according to claim 2, wherein, A support shaft (32) is installed at the lower end of the brake swing rod (11), and a roller is installed on the support shaft (32). The cam (13) corresponds to the roller.

6. The large strip transparent paper quick-change pneumatic tensioning device according to any one of claims 1 to 5, characterized in that The tensioning mechanism includes a tensioning block (6), a cylinder (10), a support rod (25), a sliding block (26) and an adjusting block (27). The support rod (25) is coaxially arranged in the support sleeve (5). The support sleeve (5) is provided with a plurality of axially extending long slots, and the plurality of long slots are evenly arranged along the circumferential direction of the support sleeve (5). The sliding block (26) is slidably arranged in the long slot, and the tensioning block (6) is installed on the sliding block (26). One end of the adjusting block (27) is hinged to the sliding block (26) through a first positioning pin (28), and the other end is coaxially hinged to the support sleeve (5) and the support rod (25) through a second positioning pin (29). The support rod (25) is provided with a radial slot for accommodating the adjusting block (27). The piston rod (10.1) of the cylinder (10) is used to drive the sliding block (26) to move.

7. The large-strip transparent paper quick-change pneumatic tensioning device according to claim 6, characterized in that, An adjusting assembly is installed at the end of the support sleeve (5). The adjusting assembly includes an adjusting bolt (30) and a return spring (31). The return spring (31) is sleeved on the adjusting bolt (30), and the return spring (31) is used to drive the sliding block (26) to reset.

8. The large-strip transparent paper quick-change pneumatic tensioning device according to claim 7, characterized in that, It further includes a fine-tuning mechanism. The fine-tuning mechanism includes a flange sleeve (2), a shaft sleeve (7) and a fine-tuning shaft sleeve (8). The flange sleeve (2) is installed on the support plate (1). The rotating body (4) is rotatably connected to the flange sleeve (2) through a bearing. The outer side of the fine-tuning shaft sleeve (8) is connected to the flange sleeve (2) through a bearing, and the inner side is connected to the shaft sleeve (7) through a thread. The shaft sleeve (7) and the cylinder (10) are installed on the cylinder seat (9), and an axial through hole for the piston rod (10.1) of the cylinder (10) to pass through is provided in the shaft sleeve (7).

9. The large-strip transparent paper quick-change pneumatic tensioning device according to claim 8, characterized in that, A positioning bolt (35) is installed on the flange sleeve (2), and a corresponding positioning groove is provided on the outer wall of the shaft sleeve (7). The positioning groove extends along the length direction of the shaft sleeve (7).

10. The large-strip transparent paper quick-change pneumatic tensioning device according to claim 1, characterized in that, The upper end of the brake swing rod (11) is provided with a brake pad, and the shape of the brake pad corresponds to the outer edge of the brake disc (3).

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