阅读说明：本技术 一种光学膜制造用拉伸装置及拉伸方法 (Stretching device and stretching method for manufacturing optical film ) 是由 李永刚 王帅 刘勇 于 2020-12-28 设计创作，主要内容包括：本发明公开了一种光学膜制造用拉伸装置及拉伸方法,涉及光学膜拉伸技术领域,包括箱体和用于输送与拉伸光学膜的辊筒一和辊筒二,以及底板,所述底板的上表面设置有可调节所述辊筒一和所述辊筒二之间转动线速度比的驱动机构一,以及用于控制所述辊筒二倾斜角度的驱动机构二。本发明具备了便于对光学膜进行拉伸,调节拉伸倍数,以及快速取下收卷后辊筒的效果,解决了现有的拉伸结构拉伸均匀度较差且整体灵活性较低,难以更改对光学膜的拉伸倍数,同时在取下收卷后的辊筒时,操作起来也较为麻烦的问题。(The invention discloses a stretching device and a stretching method for manufacturing an optical film, and relates to the technical field of optical film stretching. The invention has the effects of conveniently stretching the optical film, adjusting the stretching ratio and quickly taking down the rolled roller, and solves the problems that the existing stretching structure has poor stretching uniformity and low overall flexibility, the stretching ratio of the optical film is difficult to change, and the operation is troublesome when the rolled roller is taken down.)

1. A stretching device for manufacturing an optical film comprises a box body (1), a first roller (3) and a second roller (4) which are used for conveying and stretching the optical film (2), and a bottom plate (5), and is characterized in that: the upper surface of the bottom plate (5) is provided with a first driving mechanism capable of adjusting the rotation linear velocity ratio between the first roller (3) and the second roller (4) and a second driving mechanism for controlling the inclination angle of the second roller (4).

2. The stretching device for manufacturing an optical film according to claim 1, wherein: the first driving mechanism comprises a mounting frame (6), a first telescopic driving source (7) is fixedly connected to the side face of the mounting frame (6), a first driving portion fixedly connected with a rotary driving source (8) of the first telescopic driving source (7), a first driving portion fixedly connected with a rotary disc (9) of the rotary driving source (8), six first clamping columns (10) distributed in an annular array are fixedly connected to the side face of the rotary disc (9), a second rotary disc (11) is jointly sleeved on the surface of the first clamping columns (10), ten second clamping columns (12) distributed in the annular array are fixedly connected to the side face of the second rotary disc (11), a first spline shaft (13) is fixedly connected to the side face of the second rotary disc (11), a first spline sleeve (14) is sleeved on an outer spline portion of the first spline shaft (13), and a ball body (15) is fixedly connected to the side face of the first spline sleeve (14), the upper surface of the bottom plate (5) is fixedly connected with a fixing plate (16), the side surface of the fixing plate (16) is provided with an embedded groove used for embedding the ball body (15), the side surface of the ball body (15) is fixedly connected with a spline shaft II (17), the inner wall of the roller II (4) is provided with an inner spline groove matched with the spline shaft II (17), the upper surface of the bottom plate (5) is fixedly connected with a supporting plate (18), the lower surface of the supporting plate (18) is fixedly connected with a telescopic driving source II (19), the driving part of the telescopic driving source II (19) is fixedly connected with a connecting plate (20), the upper surface and the lower surface of the connecting plate (20) are provided with a through hole I which is communicated with each other, the hole wall of the through hole I is rotatably connected with a spline shaft III (21), the outer spline part of the spline shaft III (21) is sleeved with a spline sleeve II (22), and the upper, the surface of the second spline housing (22) is rotationally connected with the hole wall of the second through hole, the lower surface of the third spline shaft (21) is fixedly connected with a third rotary table (23), the lower surface of the third rotary table (23) is fixedly connected with twelve third clamping columns (24) distributed in an annular array, the surface of the third clamping columns (24) is attached to the surface of the first clamping columns (10), the surface of the second spline housing (22) is fixedly connected with a first conical gear (25), the upper surface of the supporting plate (18) is fixedly connected with a fixing seat (26), the side surface of the fixing seat (26) is provided with a third through hole, the hole wall of the third through hole is rotationally connected with a first connecting shaft (27), the surface of the first connecting shaft (27) is fixedly connected with a second conical gear (28), the second conical gear (28) is meshed with the first conical gear (25), and the inner wall of the first roller (3) is fixedly connected with a second connecting shaft (, the dorsal part of box (1) is seted up and is used for connecting axle two (29) are worn out and pivoted through-hole four, connecting axle two (29) with the transmission is connected with belt pulley drive mechanism (30) between connecting axle one (27).

3. The stretching device for manufacturing an optical film according to claim 2, wherein: the second driving mechanism comprises a third telescopic driving source (31), the third telescopic driving source (31) is hinged to the surface of the bottom plate (1), and a driving part of the third telescopic driving source (31) is hinged to the surface of the mounting frame (6).

4. The stretching device for manufacturing an optical film according to any one of claims 2 and 3, wherein: the diameter of the three (24) circles of the clamping columns distributed in twelve annular arrays is larger than that of the two (12) circles of the clamping columns distributed in ten annular arrays, and the diameter of the two (12) circles of the clamping columns distributed in ten annular arrays is larger than that of the first (10) circles of the clamping columns distributed in six annular arrays.

5. The stretching device for manufacturing an optical film according to claim 2, wherein: the rotary driving source (8) is a motor, and the motor is a servo motor.

6. The stretching device for manufacturing an optical film according to claim 3, wherein: the telescopic driving source I (7), the telescopic driving source II (19) and the telescopic driving source III (31) are electric push rods, and the electric push rods are of servo motor type.

7. The stretching device for manufacturing an optical film according to claim 2, wherein: the distance between every two adjacent clamping columns II (12) and the distance between every two adjacent clamping columns I (10) are matched with the diameter of the clamping column III (24).

8. The stretching method of the stretching apparatus for manufacturing an optical film according to claim 1, comprising the steps of:

s1: the first roller (3) and the second roller (4) can be driven to rotate simultaneously through the first driving mechanism, the linear speed of the second roller (4) is greater than that of the first roller (3), and the optical film (2) can be stretched through the film outlet speed being greater than the film inlet speed;

s2: meanwhile, the rotating linear velocity ratio between the second roller (4) and the first roller (3) can be adjusted through the first driving mechanism, and the stretching multiple of the optical film (2) can be changed.

Technical Field

The invention relates to the technical field of optical film stretching, in particular to a stretching device and a stretching method for manufacturing an optical film.

Background

The stretching method is a commonly used method in the process of manufacturing optical films, wherein the optical films stretched by the unidirectional stretching method have a high molecular alignment effect.

However, the stretching uniformity of the existing stretching structure is poor, the overall flexibility is low, the stretching multiple of the optical film is difficult to change, and meanwhile, when the roller after rolling is taken down, the operation is also troublesome.

Disclosure of Invention

The invention aims to provide a stretching device and a stretching method for manufacturing an optical film, which have the effects of conveniently stretching the optical film, adjusting the stretching ratio and quickly taking down a rolled roller, and solve the problems that the conventional stretching structure has poor stretching uniformity and low overall flexibility, the stretching ratio of the optical film is difficult to change, and the operation is troublesome when the rolled roller is taken down.

In order to achieve the purpose, the invention provides the following technical scheme: the stretching device for manufacturing the optical film comprises a box body, a first roller, a second roller and a bottom plate, wherein the first roller and the second roller are used for conveying and stretching the optical film, the first driving mechanism capable of adjusting the linear speed ratio of the first roller to the second roller is arranged on the upper surface of the bottom plate, and the second driving mechanism is used for controlling the inclination angle of the second roller.

Preferably, the first driving mechanism comprises a mounting frame, a first telescopic driving source is fixedly connected to the side surface of the mounting frame, a first rotary driving source is fixedly connected to a driving part of the first telescopic driving source, a first rotary disc is fixedly connected to the driving part of the first rotary driving source, six first clamping columns distributed in an annular array are fixedly connected to the side surface of the first rotary disc, a second rotary disc is jointly sleeved on the surfaces of the six first clamping columns, ten second clamping columns distributed in an annular array are fixedly connected to the side surface of the second rotary disc, a first spline shaft is also fixedly connected to the side surface of the second rotary disc, a first spline sleeve is sleeved on an external spline part of the first spline shaft, a ball is fixedly connected to the side surface of the first spline sleeve, a fixing plate is fixedly connected to the upper surface of the base plate, an embedded groove for embedding the ball is formed in the side surface of, the inner wall of the second roller is provided with an inner spline groove matched with the spline shaft two phase, the upper surface of the bottom plate is fixedly connected with a supporting plate, the lower surface of the supporting plate is fixedly connected with a second telescopic driving source, a driving part of the second telescopic driving source is fixedly connected with a connecting plate, the upper surface and the lower surface of the connecting plate are provided with a first through hole which is communicated with each other, the hole wall of the first through hole is rotatably connected with a third spline shaft, an outer spline part of the third spline shaft is sleeved with a second spline sleeve, the upper surface and the lower surface of the supporting plate are provided with a second through hole which is communicated with each other, the surface of the second spline sleeve is rotatably connected with the hole wall of the second through hole, the lower surface of the third spline shaft is fixedly connected with a third turntable, the lower surface of the third turntable is fixedly connected with twelve clamping columns, the fixed surface of spline housing two is connected with bevel gear one, the last fixed surface of backup pad is connected with the fixing base, through-hole three has been seted up to the side of fixing base, the pore wall of through-hole three rotates and is connected with connecting axle one, the fixed surface of connecting axle one is connected with bevel gear two, bevel gear two with bevel gear one meshes mutually, the inner wall fixedly connected with connecting axle two of roller one, the dorsal part of box has been seted up and has been used for connecting axle two is worn out and pivoted through-hole four, connecting axle two with the transmission is connected with belt pulley drive mechanism between the connecting axle one.

Preferably, the second driving mechanism comprises a third telescopic driving source, the third telescopic driving source is hinged to the surface of the bottom plate, and a driving part of the third telescopic driving source is hinged to the surface of the mounting frame.

Preferably, the diameter of the twelve circular columns of the clamping columns distributed in the annular array is larger than that of the ten circular columns of the clamping columns distributed in the annular array, and the diameter of the ten circular columns of the clamping columns distributed in the annular array is larger than that of the six circular columns of the clamping columns distributed in the annular array.

Preferably, the rotation driving source is a motor, and the motor is a servo motor.

Preferably, the first telescopic driving source, the second telescopic driving source and the third telescopic driving source are all electric push rods, and the electric push rods are of servo motor type.

Preferably, the distance between every two adjacent clamping columns II and the distance between every two adjacent clamping columns I are matched with the diameter of the clamping column III.

The present invention provides a drawing method comprising: a stretching method of a stretching apparatus for manufacturing an optical film, comprising the steps of:

s1: the first roller and the second roller can be driven to rotate simultaneously through the first driving mechanism, the rotating linear speed of the second roller is greater than that of the first roller, and the optical film can be stretched through the film outlet speed greater than the film inlet speed;

s2: meanwhile, the rotation linear velocity ratio between the second roller and the first roller can be adjusted through the first driving mechanism, and the stretching multiple of the optical film can be changed.

Compared with the prior art, the invention has the following beneficial effects:

first, the invention drives the first rotating disc to rotate by the rotating driving source, drives the first clamping column to rotate by the first rotating disc, drives the second rotating disc to rotate by the first clamping column, drives the clamping column to rotate by the second rotating disc, drives the third rotating disc to rotate by the clamping column and through the fitting fit between the clamping column and the third clamping column, drives the third spline shaft to rotate by the third rotating disc, drives the second spline housing to rotate through the third spline shaft and the second spline housing, drives the first conical gear to rotate through the second spline housing, drives the first connecting shaft to rotate through the first conical gear and through the meshing relationship between the first conical gear and the second conical gear, drives the second connecting shaft to rotate through the rotation of the first connecting shaft and the transmission of the belt wheel transmission mechanism, drives the first roller to rotate through the rotation of the second connecting shaft, and drives the second rotating disc to rotate through the second rotating disc, drive integral key shaft one and rotate, through integral key shaft one rotate and through spline fit between integral key shaft one and the spline housing one, drive the spheroid and rotate, rotate through the spheroid, drive integral key shaft two and rotate, rotate through integral key shaft two, drive roller two and rotate, because the diameter of the card post third circle that twelve annular array distribute is greater than the diameter of the card post second circle that ten annular array distribute, then make the rotational linear velocity of roller two be greater than a roller rotational linear velocity, thereby be greater than into membrane speed through going out membrane speed, realize the tensile to the blooming.

When the rotating linear velocity ratio between the second roller and the first roller is adjusted, the second rotating disc is pulled rightwards, so that the clamping columns are separated from the fit relation with the third clamping columns, meanwhile, the first clamping columns are respectively driven to move leftwards and the third clamping columns are driven to move downwards by the first telescopic driving source and the second telescopic driving source, the surfaces of the third clamping columns are fit with the surfaces of the first clamping columns, then, the third clamping columns can be directly driven to rotate by the rotation of the first clamping columns through the rotation of the driving source, and in the process, as the diameters of the ten clamping column two circles distributed in the annular array are larger than the diameters of the six clamping column one circles distributed in the annular array, the rotating linear velocity ratio between the second roller and the first roller is increased, the stretching multiple of the optical film can be changed, and the adjustment is convenient and quick.

When the rolled second roller needs to be taken down, the second roller is driven to rotate by taking the sphere as a circle center through the telescopic driving source III, so that the second roller is in an inclined state, the rolled second roller is convenient to take down, meanwhile, because the third clamping column, the second clamping column and the first clamping column are in a laminating arrangement, when the second roller is adjusted to incline, the laminating cooperation among the clamping columns cannot be broken, and when the second roller returns to the state shown in the figure 1 again, transmission can still be carried out among the clamping columns, and the practicability is better.

Drawings

FIG. 1 is a front view of the structure of the present invention;

FIG. 2 is a left side view of the structure of the present invention;

FIG. 3 is a bottom view of the third rotary plate and the third clamping column of the present invention;

FIG. 4 is a left side view of the first clamping column, the second rotary table, the second clamping column and the first spline shaft structure of the invention.

In the figure: 1-box body, 2-optical film, 3-roller I, 4-roller II, 5-bottom plate, 6-mounting frame, 7-telescopic driving source I, 8-rotary driving source, 9-rotary table I, 10-clamping column I, 11-rotary table II, 12-clamping column II, 13-spline shaft I, 14-spline sleeve I, 15-sphere, 16-fixing plate, 17-spline shaft II, 18-supporting plate, 19-telescopic driving source II, 20-connecting plate, 21-spline shaft III, 22-spline sleeve II, 23-rotary table III, 24-clamping column III, 25-bevel gear I, 26-fixing seat, 27-connecting shaft I, 28-bevel gear II, 29-connecting shaft II, 30-belt pulley transmission mechanism, 31-telescopic driving source III.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 4, the present invention provides a technical solution: a stretching device for manufacturing an optical film comprises a box body 1, a first roller 3, a second roller 4 and a bottom plate 5, wherein the first roller 3 and the second roller 4 are used for conveying and stretching the optical film 2, a first driving mechanism capable of adjusting the rotating linear speed ratio between the first roller 3 and the second roller 4 and a second driving mechanism capable of controlling the inclination angle of the second roller 4 are arranged on the upper surface of the bottom plate 5, the first roller 3 and the second roller 4 can be driven to rotate simultaneously through the first driving mechanism during stretching, the rotating linear speed of the second roller 4 is larger than that of the first roller 3, the film outlet speed is larger than the film inlet speed, stretching of the optical film 2 is achieved, the rotating linear speed ratio between the second roller 4 and the first roller 3 is increased through the first driving mechanism, the stretching multiple of the optical film 2 can be changed, the adjustment is convenient and quick, when the second roller 4 after being rolled needs to be taken down, through actuating mechanism two for roller two 4 inclines, and then is convenient for take off roller two 4 after the rolling.

Further, the first driving mechanism comprises a mounting frame 6, a first telescopic driving source 7 is fixedly connected to the side surface of the mounting frame 6, a first driving portion of the first telescopic driving source 7 is fixedly connected with a rotary driving source 8, a first rotary table 9 is fixedly connected with the driving portion of the rotary driving source 8, six first clamping columns 10 distributed in an annular array are fixedly connected to the side surface of the first rotary table 9, a second rotary table 11 is sleeved on the surface of the six first clamping columns 10, ten second clamping columns 12 distributed in an annular array are fixedly connected to the side surface of the second rotary table 11, a first spline shaft 13 is also fixedly connected to the side surface of the second rotary table 11, a first spline sleeve 14 is sleeved on an external spline part of the first spline shaft 13, a sphere 15 is fixedly connected to the side surface of the first spline sleeve 14, a fixing plate 16 is fixedly connected to the upper surface of the base plate 5, and an embedded groove for embedding the sphere 15 is, the side surface of the ball body 15 is fixedly connected with a second spline shaft 17, the inner wall of the second roller 4 is provided with an inner spline groove matched with the second spline shaft 17, the upper surface of the bottom plate 5 is fixedly connected with a support plate 18, the lower surface of the support plate 18 is fixedly connected with a second telescopic driving source 19, a driving part of the second telescopic driving source 19 is fixedly connected with a connecting plate 20, the upper surface and the lower surface of the connecting plate 20 are provided with a first through hole communicated with each other, the hole wall of the first through hole is rotatably connected with a third spline shaft 21, the outer spline part of the third spline shaft 21 is sleeved with a second spline sleeve 22, the upper surface and the lower surface of the support plate 18 are provided with a second through hole communicated with each other, the surface of the second spline sleeve 22 is rotatably connected with the hole wall of the second through hole, the lower surface of the third spline shaft 21 is fixedly connected with a third turntable 23, the surface of the third clamping column 24 is attached to the surface of the first clamping column 10, the surface of the second spline housing 22 is fixedly connected with a first conical gear 25, the upper surface of the supporting plate 18 is fixedly connected with a fixed seat 26, the side surface of the fixed seat 26 is provided with a third through hole, the hole wall of the third through hole is rotatably connected with a first connecting shaft 27, the surface of the first connecting shaft 27 is fixedly connected with a second conical gear 28, the second conical gear 28 is meshed with the first conical gear 25, the inner wall of the first roller 3 is fixedly connected with a second connecting shaft 29, the back side of the box body 1 is provided with a fourth through hole for the second connecting shaft 29 to penetrate out and rotate, a belt pulley transmission mechanism 30 is in transmission connection between the second connecting shaft 29 and the first connecting shaft 27, and the diameters of the third clamping columns 24 distributed in twelve annular arrays are larger than the diameters of the second clamping columns 12 distributed in ten, the diameter of the two clamp columns 12 distributed in ten annular arrays is larger than that of the first clamp column 10 distributed in six annular arrays, the first rotary table 9 is driven to rotate by rotating the driving source 8, the first clamp column 10 is driven to rotate by rotating the first rotary table 9, the second rotary table 11 is driven to rotate by rotating the first clamp column 10, the second rotary table 11 is driven to rotate by rotating the second rotary table 11, the clamp columns 12 are driven to rotate by rotating the clamp columns 12 and through the fit between the clamp columns 12 and the clamp columns three 24, the third rotary table 23 is driven to rotate, the third spline shaft 21 is driven to rotate by rotating the third spline shaft 21, the second spline sleeve 22 is driven to rotate through the spline fit between the third spline shaft 21 and the second spline sleeve 22, the first conical gear 25 is driven to rotate, and through the meshing relationship between the first conical gear 25 and the second conical gear 28, the first connecting shaft 27 is driven to rotate, the second connecting shaft 29 is driven to rotate through the rotation of the first connecting shaft 27 and the transmission of the belt pulley transmission mechanism 30, the first roller 3 is driven to rotate through the rotation of the second connecting shaft 29, the first spline shaft 13 is driven to rotate through the rotation of the second rotary table 11, the first spline shaft 13 is driven to rotate, the ball 15 is driven to rotate through the rotation of the ball 15 and the second spline shaft 17, and the second roller 4 is driven to rotate through the rotation of the second spline shaft 17 and the spline fit between the first spline shaft 13 and the first spline sleeve 14; when the rotation linear velocity ratio between the roller II 4 and the roller I3 is adjusted, the rotating disc II 11 is pulled rightwards, the clamping column 12 is separated from the laminating relation between the clamping column III 24, meanwhile, the clamping column I10 is driven to move leftwards and the clamping column III 24 is driven to move downwards through the telescopic driving source I7 and the telescopic driving source II 19 respectively, the surface of the clamping column III 24 is laminated with the surface of the clamping column I10, then, the clamping column III 24 can be directly driven to rotate through the rotation of the clamping column I10 through the rotation of the rotary driving source 8, in the process, the diameter of the clamping column II 12 circles distributed in ten annular arrays is larger than the diameter of the clamping column I10 circles distributed in six annular arrays, the rotation linear velocity ratio between the roller II 4 and the roller I3 is increased, the stretching multiple of the optical film 2 can be changed, and the adjustment is convenient and quick.

Further, actuating mechanism two is including flexible driving source three 31, flexible driving source three 31 articulates the surface of bottom plate 1, flexible driving source three 31 the drive division with the surface of mounting bracket 6 is articulated, through flexible driving source three 31, drives roller two 4 and uses spheroid 15 to rotate as the centre of a circle for roller two 4 is in the tilt state, and then is convenient for take off roller two 4 after the rolling, simultaneously because be the laminating setting between calorie post three 24 and calorie post two 12 and the card post 10, and then when adjustment roller two 4 inclines, laminating cooperation between the card post can not broken, when returning back again to the state shown in figure 1, still can transmit between each calorie post, and the practicality is better.

Further, the rotation driving source 8 is a motor, and the motor is a servo motor.

Further, the first telescopic driving source 7, the second telescopic driving source 19 and the third telescopic driving source 31 are all electric push rods, and the electric push rods are of servo motor type.

Further, the distance between every two adjacent second clamping columns 12 and the distance between every two adjacent first clamping columns 10 are matched with the diameter of the third clamping column 24.

Referring to fig. 1 to 4, the present invention provides a stretching method: a stretching method of a stretching apparatus for manufacturing an optical film, comprising the steps of:

s1: the first roller 3 and the second roller 4 can be driven to rotate simultaneously through the first driving mechanism, the rotating linear speed of the second roller 4 is greater than that of the first roller 3, and the optical film 2 can be stretched through the film outlet speed being greater than the film inlet speed;

s2: meanwhile, the ratio of the rotational linear speed between the second roller 4 and the first roller 3 can be adjusted through the first driving mechanism, so that the stretching multiple of the optical film 2 can be changed.

The working principle is as follows: when the stretching device for manufacturing the optical film is stretched, the first rotating disc 9 is driven to rotate by rotating the driving source 8, the first clamping column 10 is driven to rotate by rotating the first rotating disc 9, the second rotating disc 11 is driven to rotate by rotating the first clamping column 10, the clamping column 12 is driven to rotate by rotating the second rotating disc 11, the third rotating disc 23 is driven to rotate by rotating the clamping column 12 through the fit between the clamping column 12 and the third clamping column 24, the third rotating disc 23 is driven to rotate through rotating the third rotating disc 21, the second spline housing 22 is driven to rotate through the rotation of the third spline shaft 21 and through the spline fit between the third spline shaft 21 and the second spline housing 22, the first conical gear 25 is driven to rotate through the rotation of the first conical gear 25 and through the meshing relationship between the first conical gear 25 and the second conical gear 28, the first connecting shaft 27 is driven to rotate, and the transmission of the belt wheel transmission mechanism 30 is realized through the rotation of the first connecting shaft 27, the second connecting shaft 29 is driven to rotate, the first roller 3 is driven to rotate through the rotation of the second connecting shaft 29, the first spline shaft 13 is driven to rotate through the rotation of the second rotary table 11, the first ball 15 is driven to rotate through the rotation of the first spline shaft 13 and through spline matching between the first spline shaft 13 and the first spline sleeve 14, the second spline shaft 17 is driven to rotate through the rotation of the ball 15, the second roller 4 is driven to rotate through the rotation of the second spline shaft 17, and the linear speed of the second roller 4 is larger than that of the first roller 3 due to the fact that the diameter of twelve clamping columns in annular array distribution, namely three 24 circles, is larger than that of ten clamping columns in annular array distribution, 12 circles, and accordingly the film outlet speed is larger than the film inlet speed, and the optical film 2 is stretched;

when the rotation linear velocity ratio between the roller II 4 and the roller I3 is adjusted, the rotating disc II 11 is pulled rightwards, so that the clamping column 12 is separated from the fit relation with the clamping column III 24, meanwhile, the clamping column I10 is driven to move leftwards and the clamping column III 24 is driven to move downwards through the telescopic driving source I7 and the telescopic driving source II 19 respectively, the surface of the clamping column III 24 is fit with the surface of the clamping column I10, then, the clamping column III 24 can be directly driven to rotate through the rotation of each clamping column I10 through the rotation of the rotary driving source 8, in the process, the diameter of ten clamping column II 12 circles distributed in an annular array is larger than the diameter of six clamping column I10 circles distributed in an annular array, the rotation linear velocity ratio between the roller II 4 and the roller I3 is increased, the stretching multiple of the optical film 2 can be changed, and the adjustment is convenient and quick;

when the roller two 4 after the rolling needs to be taken down, through the three telescopic driving sources 31, the roller two 4 is driven to rotate by taking the ball 15 as the center of a circle, the roller two 4 is in an inclined state, the roller two 4 after the rolling is convenient to take down, meanwhile, the three clamping columns 24, the two clamping columns 12 and the one clamping column 10 are both in a laminating arrangement, the laminating cooperation between the clamping columns cannot be broken when the roller two 4 is adjusted to incline, and when the roller two 4 returns to the state shown in the figure 1 again, transmission can still be carried out between each clamping column, and the practicability is better.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.