CN206444834U - Diaphragm coating machine and its rolling unit - Google Patents

Abstract

The utility model discloses a coating machine for a protective film and a winding unit thereof, aiming to provide a coating machine for a protective film and a winding unit thereof which have the advantages of uninterrupted winding and improved work efficiency. The main point of the technical solution is that the frame body is also provided with a roller mechanism, the roller mechanism includes an intermediate shaft and cross connecting arms fixed at both ends of the intermediate shaft, and the cross connecting arm includes a first connecting rod and a second connecting rod arranged perpendicularly to each other. There are a number of winding rollers connected between the rod and the cross connecting arm. There is also a turning mechanism for driving the intermediate shaft to rotate in the frame. The operator can remove the protective film after the winding is completed while the winding work is in progress. In this way, the protective film can be uninterruptedly wound, and the production efficiency of the entire protective film coating line can be improved. At the same time, the positioning of the winding roller is convenient, and it is not easy to rotate, which can further improve the working efficiency.

Description

Protective film coating machine and its winding unit

technical field

The utility model relates to the field of protective film processing equipment, in particular to a protective film coating machine and a winding unit thereof.

Background technique

Film mirrors, also known as safety mirrors or explosion-proof mirrors, use a mirror filming machine to paste a layer of plastic protective film on the back of the glass mirror, so that the plastic protective film is firmly pasted on the back of the mirror. When the mirror is broken, the fragments will not be splashed randomly. While still sticking in place to avoid injury, this safety mirror is ideal for use in public areas, sliding doors, and interior decoration.

To stick the plastic protective film on the mirror, it is necessary to coat one side of the plastic protective film with a water-based adhesive to make it adhere to the mirror, so people use a coating machine to complete this work.

The coating machine is mainly used for the surface coating process production of film, paper, etc. This machine is to coat the rolled substrate with a layer of glue, paint or ink with specific functions, and then wind it up after drying.

At present, the Chinese patent with the publication number CN203791126U discloses a film coating machine, which includes a first unwinding mechanism, a traction mechanism, a five-roll coating machine, an mesh roll coating machine, a roll coating machine, UV drying machine, winding device, five-roll coater for the first coating process on the coated material, mesh roll coater for the second coating process on the coated material, and the roll coater will The paint on the coated material is evenly scraped.

Although this kind of film coating machine has eliminated the phenomenon of unevenness and asymmetry of the film in the coating process to a certain extent, and has improved the quality of the film coating process, but because the coating machine is glued roll by roll Therefore, the drying is completed and the winding also needs to be wound separately. In this way, the coating work needs to be stopped when the protective film is wound, which affects the work efficiency.

Utility model content

An object of the present utility model is to provide a winding unit for a coating machine, which has the advantages of uninterrupted winding and improved work efficiency.

The above-mentioned technical purpose of the utility model is achieved through the following technical solutions:

A winding unit for a coating machine, comprising a frame body and a winding roller, the frame body is also provided with a rolling mechanism, the rolling mechanism includes an intermediate shaft and cross connecting arms fixed at both ends of the intermediate shaft, the cross connecting arm It includes a first connecting rod and a second connecting rod arranged perpendicularly to each other, several winding rollers are rotatably connected between the cross connecting arms, and a revolving mechanism for driving the intermediate shaft to rotate is also arranged in the frame body.

In this way, when the protective film is rolled up, the rotary mechanism and the continuous roller mechanism will stop. When the winding work reaches a certain stage and the rolled protective film needs to be removed, the operator can open the rotary mechanism to drive the intermediate shaft and the cross. When the connecting arm rotates, the take-up roller rotates around the intermediate shaft and stops when it reaches a certain angle. At this time, other take-up rollers can be used to take up the protective film, and at the same time, the operator can take out the finished protective film. In this way, the protective film can be uninterrupted and the production efficiency of the entire protective film coating line can be improved.

It is further provided that the swing mechanism includes a swing motor and a sheave mechanism for controlling the intermediate shaft to rotate intermittently and at a fixed angle.

In this way, the sheave mechanism can drive the intermediate shaft to rotate intermittently in one direction. When the rotary motor drives the sheave mechanism to rotate to a certain degree, the sheave mechanism will have a certain angle of interval, and the operation of the revolving motor can be stopped at this time. , it is possible to control the winding roller to rotate to a specific angle to carry out the winding work of the protective film.

Further setting: the sheave mechanism includes a driving part and a driven part, the driven part is provided with a number of push grooves and arc grooves, the driving part is in the shape of a notched disc, and is fitted with the arc groove, and the driving part is notched A rotating arm is arranged at the center, and a straight pin used in conjunction with the push groove is fixed at one end of the rotating arm.

In this way, the rotary motor drives the active part to rotate, and the rotating arm rotates with the active part, and the cylindrical pin will enter the push groove during the rotation, driving the driven part to change its angle. As the active part continues to rotate, the cylindrical pin will leave Push the groove, the driven part is intermittent, and the active part can drive the driven part to rotate intermittently by repeating the above process, while the active part is in the shape of a notched disc and fits the arc groove, which can transition well during rotation, and at a certain To a certain extent, it can prevent the driven part from continuing to rotate or turning due to inertia, so as to achieve better stability.

Further configuration: the swing motor is provided with a driving gear set to drive the driving part to rotate, and the intermediate shaft is provided with a driven gear set, and the driven gear set is driven to rotate through the driven part.

In this way, the rotation of the rotary motor can drive the driving part to rotate through the driving gear set, and after the driving part drives the driven part to rotate, the intermediate shaft and the continuous roller mechanism can be driven to rotate through the driven gear set, so as to achieve non-intermittent winding The purpose of the protective film.

It is further provided that the driven gear set includes an intermediate gear and a shaft gear, and the shaft gear is provided with a pawl for preventing the shaft gear from reversing.

With this setting, after the winding is completed, the mass of one side of the winding unit will be much greater than that of the other side, so after the continuous roller mechanism rotates, the continuous roller mechanism will continue to rotate or turn around under the action of inertia, at this time the ratchet The pawl can block the shaft gear so that it can only rotate forward, and cooperate with the sheave mechanism to determine the stop position of the roller mechanism well.

It is further provided that: the revolving mechanism includes a revolving motor, a worm is fixed on the output shaft of the revolving motor, and a worm gear used in conjunction with it is fixed on the intermediate shaft.

In this way, the rotary motor drives the worm and the worm wheel to rotate, thereby driving the intermediate shaft to rotate. The operator can stop the motor at any angle to reach the angle where the protective film can be rolled up. The rolls reverse under the force of gravity.

Further setting: the winding rollers are arranged at both ends of the first connecting rod and the second connecting rod, and the number thereof is four.

With this arrangement, controlling the number of winding rollers to four can keep the angle between the winding rollers exactly 90°, which is convenient for the operator to adjust and change the angle and position of the winding rollers, thereby facilitating operation and improving work efficiency.

Further setting: one side of the frame body is provided with several guide rollers.

If set in this way, the function of the guide roller is to position and guide the conveyed protective film. The protective film can be wound around the guide roller to tighten the protective film and keep it flat. Because of its inconvenient relative position to the coating roller, it can be Keep the protective film tightened when winding.

Another purpose of the utility model is to provide a protective film coating machine, which has the advantages of uninterrupted winding and improved work efficiency.

The above-mentioned technical purpose of the utility model is achieved through the following technical solutions:

A coating machine for a protective film, comprising a feeding mechanism, a coating unit, a corona treatment unit, and a drying unit, as well as any one of the above-mentioned winding units for the coating machine.

In summary, the utility model has the following beneficial effects:

The operator can remove the finished protective film while the winding work is in progress, so that the protective film can be uninterrupted and the production efficiency of the entire protective film coating line can be improved. At the same time, the positioning of the winding roller is convenient and difficult Rotation occurs, which can further improve work efficiency.

Description of drawings

Fig. 1 is the structural representation of embodiment 1;

Fig. 2 is the schematic diagram of feeding unit in embodiment 1;

Fig. 3 is the schematic diagram that is used to show limit post in embodiment 1;

Fig. 4 is the schematic diagram of corona treatment unit in embodiment 1;

Fig. 5 is the structural representation of corona treatment unit in embodiment 1;

Fig. 6 is the schematic diagram of coating unit in embodiment 1;

Fig. 7 is the schematic diagram of scraper in embodiment 1;

Fig. 8 is a schematic structural view of the winding unit in Embodiment 1;

Fig. 9 is the schematic diagram of the sheave mechanism in embodiment 1;

Fig. 10 is the schematic diagram of corona treatment unit in embodiment 2;

Fig. 11 is the schematic diagram of corona treatment unit in embodiment 3;

Fig. 12 is a schematic diagram of the winding unit in Embodiment 4.

In the figure, 1, feeding unit; 11, first vertical plate; 12, second vertical plate; 13, chute; 131, lifting section; 132, straight section; 14, frame; 15, fixed rod; 16 , oblique rod; 17, laminating roller; 2, film supply roller; 21, rolling bearing; 211, fixing hole; 22, rotating gear; 23, winding gear; 24, winding motor; 3, lifting mechanism; 31, lifting Motor; 32, driving gear; 33, auxiliary gear; 34, transmission chain; 35, limit block; 36, linkage shaft; 4, machine body; 41, leg; 5, coating unit; 51, base frame; 511, material Groove; 512, guide roller; 513, coating roller; 513-1, slide block; 514, scraper; 514-1, knife plate; 514-2, edge; , driving mechanism; 521, sliding cylinder; 53, connecting mechanism; 531, rotating arm; 532, connecting cylinder; 533, limit pin; 6, corona treatment unit; 61, shell; 61-1, upper shell; 61 -2. Lower shell; 61-3. Guide film roller; 62. Corona generator; 621. Arc surface; 63. Opening and closing unit; 631. Driving cylinder; 632. Driving connecting rod; 632-1. Connecting rod ; 632-2, arched connecting rod; 632-3, auxiliary connecting rod; 632-4, first driving arm; 632-5, second driving arm; 632-6, driving rod; 7, winding unit; 71, Frame body; 72, winding roller; 73, continuous roller mechanism; 731, intermediate shaft; 732, cross connecting arm; 732-1, first connecting rod; 732-2, second connecting rod; 74, swing mechanism; 741 , rotary motor; 742, sheave mechanism; 742-1, driving part; 742-11, rotating arm; 742-12, cylindrical pin; 742-2, driven part; 742-21, push groove; Arc groove; 742-3, driving gear set; 742-4, driven gear set; 742-41, intermediate gear; 742-42, shaft gear; 743, worm; 744, worm gear; 8, drying unit; 81 . Drying box; 82. Ventilation pipe.

detailed description

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Embodiment 1: a kind of coating machine for protective film, as shown in Figure 1, it comprises body 4, and body 4 is suspended in the air, and several legs 41 are fixed between the bottom of body 4 and the ground to support body 4, body The left end of 4 is provided with a coating unit 5, which can coat glue on one side of the protective film. The drying unit 8 is directly above the body 4. The drying unit 8 includes a drying box 81, and the middle of the drying box 81 is arched upwards. Form the shape of an arch bridge, which can reduce the possibility of the protective film sagging when it enters the drying box 81 for drying. At the same time, the top of the drying box 81 is provided with a ventilation pipe 82, which is convenient to speed up the air circulation in the drying box 81 to achieve a higher temperature. For a good drying effect, the right end of the machine body 4 is a winding unit 7, and the bottom of the machine body 4 is provided with a feeding unit 1 on the side close to the coating unit 5.

Referring to Fig. 1, the protective film enters the coating unit 5 on the left side from the feeding unit 1 to apply glue, and then enters the drying box 81 above. The right end of 4 stretches out and the protective film is rolled up by the winding unit 7, thereby completing the gluing work of the protective film, a corona treatment unit 6 is also arranged between the feeding unit 1 and the coating unit 5, and the The processing unit 6 discharges the surface of the protective film, which can improve the adhesion of the protective film surface, so that the water-based adhesive can be more easily attached to the surface of the protective film, thereby achieving a better coating effect.

As shown in Figure 2, the feeding unit 1 of the coating machine includes a frame 14 and a film supply roller 2, and a lifting mechanism 3 for lifting the film supply roller 2 is also provided on the frame 14. The same first vertical plate 11 and the second vertical plate 12, the right side of the first vertical plate 11 is inclined downwards, and its top edge is provided with a chute 13, and the chute 13 is divided into two sections. The downward sloping part of a vertical plate 11 is the lifting section 131, and the part on the left side parallel to the ground is a straight section 132. The height of the topmost position of the lifting section 131 is higher than the height of the straight section 132. Under the action of the mechanism 3, it slides along the position of the chute 13.

Referring to Fig. 2, there are three gears on the inside of the first vertical plate 11 and the second vertical plate 12, and the three gears on each side are arranged in the shape of a character, wherein the gear located on the inner side of the bottom is the driving gear 32. The other gears are auxiliary gears 33. The driving gear 32 on both sides is connected and driven by a linkage shaft 36. The driving gear 32 and auxiliary gear 33 are driven by a transmission chain 34. The side of the transmission chain 34 close to the lifting section 131 is fixed. There are two limit blocks 35, and the limit block 35 can rise along the track of the lifting section 131 with the rotation of the transmission chain 34. The limit block 35 is arranged in a hook shape, and the direction of its opening is upward, so that the film supply can be Both ends of the roller 2 are firmly locked in the limit block 35 and bring the film supply roller 2 up along the track of the lifting section 131 .

As shown in Figure 2, a lifting motor 31 is provided on the side facing away from the driving gear 32 on the first vertical plate 11, and the output shaft of the lifting motor 31 penetrates the first vertical plate 11 and is fixed with the linkage shaft 36 in the middle, so that Just can drive driving gear 32 to rotate, reach the purpose of raising film supply roller 2, simultaneously the two ends of supply film roller 2 are provided with rolling bearing 21, and rolling bearing 21 is stuck in the chute 13, and film supply roller 2 just can when rising like this Slide along the track of the chute 13, and limit it so that it can enter the next stage accurately.

As shown in Figure 2 and Figure 3, the left side of the straight section 132 is provided with a limit column 515, when the film supply roller 2 reaches the position of the limit column 515, the position of the film supply roller 2 can be more accurately limited, while the limit The position post 515 is hinged with a fixed rod 15, and the rolling bearings 21 at both ends of the film supply roller 2 are provided with a matching fixed hole 211. When the film supply roller 2 reaches the designated position, the fixed rod 15 can be passed through the fixed hole 211 Inside, the two-phase cooperation can limit the position of the film supply roller 2, and does not hinder the rotation of the film supply roller 2. The left side of the limit post 515 is provided with a slanting rod 16, and the end of the slanting rod 16 is rotatably connected with a pressure film Roller 17, the protective film on the film supply roller 2 can make protective film be in the state of tightening up for a long time through pressure film roller 17, and keep the smoothness of protective film surface to improve the quality of glue coating.

Referring to Fig. 3, a winding motor 24 is arranged on the position close to the limit post 515 on the vertical plate, and the winding motor 24 can drive the film supply roller 2 to rotate in the opposite direction through the winding gear 23, so that the protective film is coated with glue. If there is a problem, the winding motor 24 can be started to rewind the protective film on the supply film roller 2, so as to prevent the protective film from being damaged too much.

As shown in Fig. 4 and Fig. 5, corona treatment unit 6 comprises casing 61, and casing 61 is arranged in the shape of cuboid, and is divided into upper and lower two parts, is respectively upper casing 61-1 and lower casing 61-2, and upper casing The body 61-1 is rotatably connected with a film guide roller 61-3, and the protective film passes through the film guide roller 61-3 after passing through the pressure film roller 17, and a corona generator 62 is arranged in the lower housing 61-2, and the electric The halo generator 62 is in the shape of a strip, and its upper surface is concave to form an arc surface 621, which is attached to the outer surface of the film guiding roller 61-3.

4 and 5, the upper housing 61-1 and the lower housing 61-2 are connected by an opening and closing unit 63, including a driving cylinder 631 and a driving connecting rod 632 symmetrically arranged at both ends of the housing 61, and the driving cylinder 631 The output shaft is hinged to the lower housing 61-2, and the other end is hinged to the upper housing 61-1. The drive link 632 includes a connecting rod 632-1, and the upper end of the connecting rod 632-1 is hinged to the upper housing 61-1. The lower end and the lower housing 61-2 are fixed through two connection points, so that when the driving cylinder 631 is extending or pulling back the output shaft, the connecting rod 632-1 can drive the lower housing 61-2 to approach or move away from the upper housing 61 -1, achieve the purpose of opening or closing the shell 61.

As shown in Figure 6, the left side of corona treatment unit 6 is coating unit 5, and coating unit 5 comprises pedestal 51, and pedestal 51 is fixed with hopper 511, and hopper 511 is near the side of corona treatment unit 6 A guide roller 512 is rotatably connected, and a coating roller 513 is arranged in the trough 511. The protective film is wound on the coating roller 513 under the action of the guide roller 512 and enters the trough 511 to apply glue. 513 and both ends of the guide roller 512 are connected with a slider 513-1 through a rolling bearing 21, the slider 513-1 is embedded in the slide rail 516 on the base frame 51, and is driven to slide by the driving mechanism 52, and the driving mechanism 52 includes The sliding cylinder 521 that is fixed on the base frame 51, the output shaft of the sliding cylinder 521 is fixed on the slide block 513-1, so that the slide block 513-1 and the coating roller 513 can slide on the base frame 51 under the action of the slide cylinder 521. Slip on.

6, the left side of the coating roller 513 is provided with a scraper 5133. The scraper 514 is fixed on the base frame 51 through a connecting mechanism 53. Cylinder 532, the middle of rotating arm 531 is hinged with pedestal 51, and one end thereof is hinged with the output shaft of connecting cylinder 532, and the other end is fixed on the scraper 514, and when the output shaft of connecting cylinder 532 moves like this, just can drive rotating arm 531 around The rotation of the hinge point in the middle can drive the doctor blade 514 to approach or move away from the coating roller 513 .

As shown in Figure 6 and Figure 7, several limit pins are also fixed on the base frame 51, when the rotating arm 531 rotates, it can be limited by the limit pins, and the scraper 514 can be easily rotated to a fixed position to stop, see Fig. 7, the scraper 514 includes a blade 514-1 and a blade edge 514-2. During operation, the blade edge 514-2 collides with the coating roller 513, and its surface is an arc that fits the outer circle of the coating roller 513. shape, so that the scraper 514 can make the protective film close to the coating roller 513, and can well achieve the effect of scraping off excess glue.

As shown in Figures 1 and 8, after the protective film is dried by the drying unit 8, it enters the winding unit 7 for winding and packaging. In the intermediate shaft 731 in the center, the two ends of the intermediate shaft 731 are provided with a cross connecting arm 732, and the cross connecting arm 732 includes a first connecting rod 732-1 and a second connecting rod 732-2 perpendicular to each other, and the cross connecting arm 732 rotates Four winding rollers 72 are connected, and the four end points of the cross connecting arm 732 are provided with rollback motors, which can drive the winding rollers 72 to rotate so as to achieve the effect of winding the protective film. There is a swivel mechanism 74 for driving the continuous roller mechanism 73 to rotate, so that the four winding rollers 72 can be used alternately to achieve the purpose of performing winding work without stopping the coating work.

8 and 9, the rotary mechanism 74 includes a rotary motor 741 fixed in the frame body 71 and a sheave mechanism 742. The sheave mechanism 742 includes two parts, the right side is the active part 742-1, and the active part 742-1 It is in the shape of a disc with a notch, and the notch is provided with a rotating arm 742-11, and the end of the rotating arm 742-11 is fixed with a cylindrical pin 742-12, and the other part of the sheave mechanism 742 is a driven part 742-2. The four sides of the part 742-2 are sunken inwards to form an arc-shaped groove 742-22. The arc-shaped groove 742-22 is engaged with the shape of the active part 742-1, and the driven part 742-2 is also provided with four push grooves 742- 21. The push groove 742-21 is compatible with the cylindrical pin 742-12.

Referring to Fig. 9, the driving part 742-1 is provided with a driving gear set 742-3, the swing motor 741 drives the driving part 742-1 to rotate through the driving gear set 742-3, and the driven part 742-2 is provided with a driven gear set 742-4, the driven gear set 742-4 includes an intermediate gear 742-41 and a shaft gear 742-42, the shaft gear 742-42 is fixed with the intermediate shaft 731, and the intermediate gear 742-41 is fixed with the driven part 742-2, when When the cylindrical pin 742-12 enters the push groove 742-21, the driving part 742-1 drives the driven part 742-2 to rotate, and the intermediate gear 742-41 can drive the shaft gear 742-42 and the intermediate shaft 731 to rotate, so that it can drive The roller mechanism 73 rotates, and the shaft gear 742-42 is provided with a pawl (not shown in the figure), which can prevent the shaft gear 742-42 from reversing.

Embodiment 2: A coating machine for protective film, the difference from Embodiment 1 is that, as shown in FIG. There are two parts of the rod 632-3, the bow-shaped connecting rod 632-2 is arranged in an inclined "L" shape, its right end is hinged with the output shaft of the drive cylinder 631, and its left end is hinged with the lower housing 61-2, and the bending in the middle position The point is hinged with the body 4, so that the driving cylinder 631 can drive the bow-shaped connecting rod 632-1 to rotate around its middle position, thereby driving the lower housing 61-2 to approach or move away from the upper housing 61-1, while the auxiliary connecting rod 632-3 They are respectively hinged on the upper shell 61-1 and the lower shell 61-2, and are arranged parallel to the left half of the arcuate connecting rod 632-2, which can strengthen the stability of the connection of the shell 61, and assist the arcuate connecting rod 632-2 to achieve a better connection effect.

Embodiment 3: A coating machine for protective film. The difference from Embodiment 1 or 2 is that, as shown in FIG. 11 , the driving link 632 includes a first driving arm 632-4 and a second driving arm 632- 5. They are cross-hinged in the middle, and the two points at the upper end are slidingly connected with the upper casing 61-1, and the two points at the lower end are slidingly connected with the lower casing 61-2. The driving cylinder 631 is fixed on the upper body 4, and the driving cylinder 631 The output shaft is hinged with two driving rods 632-6, and the other ends of the two driving rods 632-6 are respectively hinged on the upper ends of the first driving arm 632-4 and the second driving arm 632-5, so that the output of the driving cylinder 631 When the shaft moves, the driving rod 632-6 can push the first driving arm 632-4 and the second driving arm 632-5 to slide and change the angle between them, so as to achieve the effect of opening and closing the casing 61 .

Embodiment 4: A coating machine for a protective film. The difference from Embodiment 1 or 2 or 3 is that, as shown in FIG. 12 , the revolving mechanism 74 in the winding unit 7 includes a The rotary motor 741, the output shaft of the rotary motor 741 is fixed with a worm screw 743, the intermediate shaft 731 is fixed with a worm gear 744 which is engaged with it, and the rotation of the output shaft of the drive motor can make the worm screw 743 drive the worm gear 744 and the intermediate shaft 731 to rotate, Stop when reaching a specific angle, and the self-locking property of the worm wheel 744 can prevent the roller mechanism 73 from reversing, so as to achieve a better positioning effect.

The above-mentioned embodiment is only an explanation of the utility model, and it is not a limitation of the utility model. Those skilled in the art can make modifications to the embodiment without creative contribution according to needs after reading this description, but as long as it is within the utility model All new claims are protected by patent law.

Claims (9)

1. A winding unit for a coating machine, comprising a frame body (71) and a winding roller (72), characterized in that: the frame body (71) is also provided with a roller mechanism (73), and the roller The mechanism (73) includes an intermediate shaft (731) and a cross connecting arm (732) fixed at both ends of the intermediate shaft (731). The cross connecting arm (732) includes a first connecting rod (732-1) and a second The connecting rod (732-2), the cross connecting arm (732) is rotatably connected with several winding rollers (72), and the frame body (71) is also provided with a revolving mechanism (74) for driving the intermediate shaft (731) to rotate. ). 2. The rewinding unit for a coating machine according to claim 1, characterized in that: the revolving mechanism (74) includes a revolving motor (741) and a groove for controlling the intermediate shaft (731) to rotate intermittently and at a fixed angle Wheel mechanism (742). 3. The winding unit for coating machine according to claim 2, characterized in that: the sheave mechanism (742) comprises a driving part (742-1) and a driven part (742-2), and the driven part (742-2) is provided with a number of push grooves (742-21) and arc grooves (742-22), and the active part (742-1) is in the shape of a notched disc, and is attached to the arc groove (742-22). A rotating arm (742-11) is provided at the gap of the active part (742-1), and a cylindrical pin (742-12) used in conjunction with the push groove (742-21) is fixed at one end of the rotating arm (742-11) . 4. The winding unit for coating machine according to claim 3, characterized in that: the rotary motor (741) is provided with a driving gear set (742-3) to drive the driving part (742-1) to rotate, and the intermediate shaft (731) is provided with a driven gear set (742-4), and the driven gear set (742-4) is driven to rotate by the driven part (742-2). 5. The winding unit for coating machine according to claim 4, characterized in that: the driven gear set (742-4) includes an intermediate gear (742-41) and a shaft gear (742-42), the shaft The gear (742-42) is provided with a ratchet for preventing the reverse rotation of the shaft gear (742-42). 6. The winding unit for coating machine according to claim 1, characterized in that: the revolving mechanism (74) comprises a revolving motor (741), and a worm (743) is fixed on the output shaft of the revolving motor (741) , the intermediate shaft (731) is fixed with the worm gear (744) used in conjunction with it. 7. The winding unit for coating machine according to claim 1, characterized in that: the winding roller (72) is arranged on the first connecting rod (732-1) and the second connecting rod (732-2) The two ends, the number is four. 8. The winding unit for a coating machine according to claim 7, characterized in that: one side of the frame body (71) is provided with several guide rollers (512). 9. A protective film coating machine, comprising a feeding unit (1), a coating unit (5), a corona treatment unit (6) and a drying unit (8), characterized in that: with The winding unit for a coater according to any one of ˜8.