CN214527199U - Device for rolling, unfolding, flatly covering and arranging plastic film on planar matrix - Google Patents

Abstract

The utility model relates to the technical field of film paving equipment, in particular to a device for rolling, unfolding, flattening and covering a plastic film on a plane matrix, which comprises a box body, wherein the box body is a cuboid structure with an inner cavity and an opening at the bottom, two telescopic link rotating shafts are symmetrically arranged and are respectively movably connected on the outer surfaces of a front side plate and a rear side plate of the box body; the device has the functions of positioning, film rolling, flattening, rolling, bubble discharging and cutting, can greatly improve the working efficiency of film coating, shorten the film coating time, improve the film coating quality and reduce the labor cost; on the other hand, the flexible flattening and rolling device is arranged, and particularly, the flexible flattening and rolling device can play a good protection and flattening effect on thin plastic films which are easy to break and wrinkle. In addition, set up automatic film pressing device, can guarantee to make the plastic film also can fine laminating wall body when the vertical plane tectorial membrane, improve the tectorial membrane quality.

Description

Device for rolling, unfolding, flatly covering and arranging plastic film on planar matrix

Technical Field

The utility model relates to a spread membrane equipment technical field, especially relate to a device that is used for rolling exhibition flat cover on plane base member and establishes plastic film.

Background

The information disclosed in the background of the invention is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information constitutes prior art that is already known to a person of ordinary skill in the art.

The effect of the need to cover the film for moisture retention and protection for certain flat substrates, for example: the maintenance and protection of the cast-in-place concrete planar matrix can effectively lock water, keep the surface of the concrete matrix moist and create a closed moisture-preserving environment, so that on one hand, the insufficient strength reduction of concrete hydration caused by excessive water loss can be effectively reduced, and the concrete strength is improved; on the other hand, the probability and the quantity of drying shrinkage and crack generation caused by water loss can be effectively reduced; and in the third aspect, the external action can be effectively reduced, the carbonization depth is reduced, the hydration degree and the compactness of the surface of the concrete are improved, and the sensory quality of the surface of the concrete is improved. At present, it adopts artifical pad pasting mode usually to cover to establish plastic film on plane base member, because of operating personnel's technical operation level difference, tectorial membrane effect difference is great, and work efficiency is lower, and the plastic film in addition is because of the texture is thinner, and is easy damaged usually, and the tectorial membrane often appears damaged, fold, overlap, bubble, unevenness scheduling problem, leads to the tectorial membrane to drop easily, and the effect of moisturizing and the protection of tectorial membrane is not good. Most of certain film sticking equipment aims at a film sticking device of a horizontal plane substrate, vertical pulling is usually adopted, the plastic protection and flattening bubble discharging effect is poor, and the problems of film damage and corrugation re-sticking easily occur.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model provides a device that is used for rolling the exhibition flat of plane base member and covers and establish plastic film, makes the plastic film can fine laminating wall body when this kind of device can guarantee the tectorial membrane, improves the tectorial membrane quality. In order to achieve the above object, the technical solution of the present invention is as follows.

An apparatus for roll-out laying flat plastic film on a planar substrate, comprising: box, telescopic link pivot, telescopic link extension spring, locator, first sword, the first magnetic strip of tailorring, the second magnetic strip of tailorring, spool mount, square pedestal, circular pivot, film spool, first spring, swash plate, accessory plate, the second sword, wheel and driving roller of tailorring. Wherein: the box is the cuboid structure that has inner chamber and bottom open-ended, two that the telescopic link pivot was the symmetry setting, swing joint respectively on the surface of preceding, the posterior lateral plate of box. The telescopic link is two, corresponds one respectively the telescopic link pivot, and the one end of telescopic link is connected in the telescopic link pivot. And two ends of the extension spring of the extension rod are respectively connected with the box body side plate where the extension rod rotating shaft is located and the extension rod. The locator is rectangular form, and its both ends are connected respectively on two telescopic link respective other ends, and the locator level sets up. The first cutting knife in a long strip shape is connected in a groove at the lower part of the front wall surface of the positioner. The first magnetic attraction strip is fixed on the upper portion of the front wall face of the positioner, and the second magnetic attraction strip is used for being adsorbed on the first magnetic attraction strip. The scroll fixing frame is an inverted U-shaped groove, the scroll fixing frame is fixed on the front side plate and the rear side plate of the box body respectively, and the side plate area where the scroll fixing frame is located is hollowed. The square shaft bracket is positioned in the scroll fixing bracket, and the round rotating shaft is fixed on the square shaft bracket. The two ends of the film reel are respectively movably connected to the two circular rotating shafts, and the film reel is horizontally arranged. The upper end of the first spring is connected to the top of the scroll fixing frame, and the lower end of the first spring is connected to the top wall of the square scroll frame. The left side downward sloping of the roof of box forms the swash plate, and the swash plate is located the upper left portion of spool mount, attach the vertical unsettled in the box of board, and the upper end that attaches the board passes the swash plate upper shed, attach the board and can move about from top to bottom along the box. The second cutting knife is fixed at the lower end of the auxiliary plate. The wheels are connected to the bottom of the box body, and the driving roller is movably connected to the opening in the bottom of the box body.

Further, the driving roller includes: film pressing roller, splayed line expansion roller pair roller and film roll up the pair roller, wherein, the film pressing roller sets up in the lower left corner department of box, and the lower surface of film pressing roller extends to the outer back of bottom half and flushes with the lower surface of wheel, splayed line expansion roller is located the right side of film pressing roller, splayed line expansion roller pair roller is located splayed line expansion roller under, the film is rolled up the pair roller and is located the film spool under, and the second cutter is located between film pressing roller and the splayed line expansion roller.

The device further comprises a magnetic bottom plate connected in an opening at the lower part of the box body, the magnetic bottom plate is adsorbed on the magnetic sheets on the front side plate and the rear side plate of the box body, and two ends of the splayed unfolding roller pair and the film rolling pair are respectively and movably fixed on the magnetic bottom plate. The magnetic bottom plate is convenient for installing the film roll, replacing the film roll, cutting off the film roll after finishing film pasting, opening the bottom plate, and continuously pulling out the film for next film pasting.

Furthermore, an upper limiting column and a lower limiting column are respectively fixed on the side plates of the box body above and below the rotating shaft of the telescopic rod.

Further, still include crossbeam mounting bracket, crossbeam and second spring, the crossbeam mounting bracket is two sets of, fixes respectively on the inner wall of the preceding of box, posterior lateral plate, and the crossbeam with attach the through-hole that all has the bar on the board, pass this bar through-hole through bolt and nut after with crossbeam swing joint attach the board on, and the bolt can horizontal migration in the through-hole of bar to the messenger attaches the board and can carry out certain removal along the direction of the preceding, the back of box. The both ends of crossbeam are located the crossbeam mounting bracket on the preceding, the posterior lateral plate of box respectively, the second spring is located the crossbeam mounting bracket, and the upper end and the crossbeam of second spring are connected, and the lower extreme of second spring is connected with the bottom surface of crossbeam mounting bracket to form the support to the crossbeam, make attach board and second to tailor the unsettled lower part opening top at the box of sword.

Furthermore, the upper part of the auxiliary plate is also connected with a first handle, so that the auxiliary plate is convenient to use.

Further, all be connected with spring fixed column on the roof lower surface of spool mount and the roof upper surface of square pedestal, the both ends of first spring are connected respectively on corresponding spring fixed column.

Furthermore, an installation groove is formed in the end portion of the circular rotating shaft, an annular roller pulley block is connected to the installation groove, and the film reel is located in the installation groove and is in sliding connection with the annular roller pulley block.

Furthermore, the reel fixing frame further comprises a strip-shaped plate-shaped bottom buckle which is positioned in the lower port of the reel fixing frame, and the bottom buckle is fixed on a side plate of the box body through bolts.

Further, a handle groove is formed in the right side surface of the top plate of the box body, and a second handle is movably connected to the handle groove so that the box body can be conveniently lifted.

Compared with the prior art, the utility model discloses following beneficial effect has:

(1) the utility model discloses a box appearance is the cuboid, and the box top surface is the level, when invering the box and operating, can make the box be in horizontal stable state under the inversion condition, helps the installation and the tensile process of film book, keeps the stability of box, does not take place to rock under the atress.

(2) The utility model designs a structure of constituteing by spool mount, square pedestal, circular pivot, film spool and first spring can make film book and film book pair roller 22 remain the contact all the time under the elasticity of first spring promotes, because: along with the use consumption of film book, the thickness of film book reduces gradually, and first spring and then stretch promotes film book and film book pair roller and remain the contact laminating all the time, helps making the film can flatly launch and laminate all the time at the lower edge of splayed line expansion roller after breaking away from the film book, effectively guarantees the planarization of film.

(3) In the film rolling and stretching process, the utility model discloses splayed lines on the splayed line expansion roller that sets up can play and expand the efficiency that pushes away the tie outward with the film, can effectually avoid the film fold, overlap the scheduling problem to appear in stretching process.

(4) The utility model discloses a tailor the device by attaching board, second to tailor sword, crossbeam mounting bracket, crossbeam and second spring and constitute, and press downwards and draw and attach the board and accomplish the film cutting and tailor the planarization that can guarantee the film tail end, cut the back and tailor the automatic suspension of sword in the film top, use simple and convenient high efficiency under the elastic force of second spring under the cutting is accomplished.

(5) The utility model discloses a press mold roller makes the film and the horizontal base face of stretching out in the box remain the laminating state throughout effectively to roll at press mold roller and push down the bubble discharge and the exhibition flat in the film, make the film can laminate on the horizontal base face smoothly.

(6) The upper limit column designed by the utility model can ensure that the positioner and the telescopic rod can not exceed the top surface of the box body in the releasing and rebounding state; and the lower limiting column can ensure that the positioner and the telescopic rod can not contact the film pressing roller in a stretching state, so that the work of the film pressing roller is prevented from being influenced.

(7) For the positioner designed by the utility model, the first cutting knife is arranged below the first magnetic suction strip and the second magnetic suction strip for fixing the film, so that the film can be automatically released after the film is cut by the first cutting knife; the strip-shaped first cutting knife can ensure that the cut part of the end of the film is in a flat state, so that the film joint is prevented from being wrinkled, and the coating and laminating effect of the film on a horizontal substrate is improved.

(8) The utility model discloses a press mold roller is in same horizontal plane with the wheel on, can make the film be in the roll-in laminating state all the time at tensile in-process to improve the exhibition flat laminating effect of film.

Drawings

The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.

Fig. 1 is a front view of an apparatus for rolling, unrolling, and laying a plastic film on a planar substrate according to an embodiment of the present invention.

Fig. 2 is a top view of an apparatus for rolling, unrolling, and laying a plastic film on a planar substrate according to an embodiment of the present invention.

Fig. 3 is a front view of the case in the embodiment of the present invention.

Fig. 4 is a schematic structural view of the square shaft bracket and the circular rotating shaft in the embodiment of the present invention.

Fig. 5 is a schematic structural view of a cutting device in an embodiment of the present invention.

Fig. 6 is a top view of a positioner according to an embodiment of the present invention.

Fig. 7 is a schematic structural view of an splayed unwinding roller according to an embodiment of the present invention.

The scores in the above figures represent: 1-box body, 2-telescopic rod rotating shaft, 3-telescopic rod, 4-telescopic rod extension spring, 5-positioner, 6-first cutting knife, 7-first magnetic attraction strip, 8-second magnetic attraction strip, 9-scroll fixing frame, 10-square shaft frame, 11-round rotating shaft, 12-film scroll, 13-first spring, 14-inclined plate, 15-attached plate, 16-second cutting knife, 17-wheel, 18-groove, 19-film pressing roller, 20-splayed unwinding roller, 21-splayed unwinding roller pair roller, 22-film winding pair roller, 23-magnetic attraction bottom plate, 24-magnetic attraction sheet, 25-upper limit column, 26-lower limit column, 27-cross beam mounting frame, 28-cross beam, 29-second spring, 30-a first handle, 31-a spring fixing column, 32-a bottom buckle, 33-a hand groove, 34-a second handle and 35-a film.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

For convenience of description, the words "upper", "lower", "left" and "right" in the present invention, if appearing in the drawings, are intended only to indicate the correspondence of the upper, lower, left and right directions of the drawings themselves, not to limit the structure, but merely to facilitate the description of the invention and to simplify the description, and are not intended to indicate or imply that the equipment or components so referred to need to have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention; the description will be further described with reference to the drawings and specific examples.

With reference to fig. 1 to 6, there is illustrated an apparatus for rolling, unrolling and laying plastic film on a planar substrate according to the present invention, comprising: box 1, telescopic link pivot 2, telescopic link 3, telescopic link extension spring 4, locator 5, the first sword 6 of tailorring, first magnetism inhale strip 7, second magnetism inhale strip 8, spool mount 9, square pedestal 10, circular pivot 11, film spool 12, first spring 13, swash plate 14, attach board 15, the second is tailor sword 16, wheel 17 and driving roller, wherein:

the box body 1 is composed of a top plate, a left side plate, a right side plate, a front side plate and a rear side plate, and a cuboid box body with an inner cavity and an opening at the bottom is formed between the side plates after the side plates are fixedly combined and installed through screws at four corners. A handle groove 33 is arranged on the right side surface of the top plate of the box body 1, and a second handle 34 is movably connected in the handle groove 33 so as to be convenient for lifting the box body.

The telescopic rod rotating shafts 2 are symmetrically arranged and are respectively and movably connected to the outer surfaces of the front side plate and the rear side plate of the box body 1. The number of the telescopic rods 3 is two, the two telescopic rods correspond to the telescopic rod rotating shaft 2 respectively, one end of each telescopic rod 3 is connected to the corresponding telescopic rod rotating shaft 2, and in the embodiment, each telescopic rod 3 is of a sleeve type telescopic structure.

And two ends of the telescopic rod extension spring 4 are respectively connected with the box body side plate where the telescopic rod rotating shaft 2 is located and the telescopic rod 3. The positioner 5 is in a long strip shape, two ends of the positioner are respectively connected to the other ends of the two telescopic rods 3, and the positioner 5 is horizontally arranged. The first cutting knife 6 in a long strip shape is connected in a groove 18 at the lower part of the front wall surface of the positioner 5, and the first cutting knife 6 is a preservative film cutting blade. The first magnetic attraction strip 7 is fixed on the upper portion of the front wall face of the positioner 5, and the second magnetic attraction strip 8 is used for being adsorbed on the first magnetic attraction strip 7. Because the first cutting knife 6 is arranged below the first magnetic suction strip 7 and the second magnetic suction strip 8 for fixing the thin film, the thin film can be automatically released after the thin film 35 is cut by the first cutting knife 6; the strip-shaped first cutting knife 6 can ensure that the cut part of the end of the film is in a flat state, prevent the film joint from being wrinkled and improve the covering and laminating effect of the film on a horizontal substrate.

The scroll fixing frame 9 is an inverted U-shaped groove, the scroll fixing frame 9 is respectively fixed on the front side plate and the rear side plate of the box body 1, and the side plate area where the scroll fixing frame 9 is located is hollowed out. The square shaft bracket 10 is positioned in the scroll fixing bracket 9, and the round rotating shaft 11 is fixed on the square shaft bracket 10.

The film roll 12 is cylindrical and has a film roll 35 wound around its outer surface. Two ends of the film reel 12 are respectively movably connected to the two circular rotating shafts 11, and the film reel 12 is horizontally arranged. Spring fixing columns 31 are connected to the lower surface of the top wall of the scroll fixing frame 9 and the upper surface of the top wall of the square shaft frame 10, and two ends of the first spring 13 are connected to the corresponding spring fixing columns 31 respectively. The structure composed of the reel fixing frame 9, the square reel frame 10, the circular rotating shaft 11, the film reel 12 and the first spring 13 can make the film roll and the film roll pair roller 22 always keep contact under the pushing of the elastic force of the first spring because: along with the use consumption of film book, the thickness of film book reduces gradually, and first spring and then stretch promotes film book and film book pair roller and remain the contact laminating all the time, helps making the film can flatly launch and laminate all the time at the lower edge of splayed line expansion roller after breaking away from the film book, effectively guarantees the planarization of film.

The left side of the top plate of the box body 1 is inclined downwards to form the inclined plate 14, and the inclined plate 14 is positioned at the upper left part of the scroll fixing frame 9. The auxiliary plate 15 is vertically suspended in the box body 1, the upper end of the auxiliary plate 15 penetrates through the upper opening of the inclined plate 14, the auxiliary plate 15 can move up and down along the front side plate and the rear side plate of the box body 1, and a worker extends a hand to the inclined plate 14 to press the auxiliary plate to cut a film. The second cutting knife 16 is fixed at the lower end of the attached plate 15. The driving roller is movably connected in the opening at the bottom of the box body 1, and the wheels are connected at the bottom of the box body 1.

Further, with reference to fig. 1 and 7, in other embodiments, the drive roller comprises: film pressing roller 19, splayed line expansion roller 20, splayed line expansion roller pair roller 21 and film roll up pair roller 22, wherein, film pressing roller 19 sets up in the lower left corner department of box 1, and film pressing roller 19's lower surface extends to the bottom half outer back and flushes with the lower surface of wheel 17, and film pressing roller 19 and wheel are in same horizontal plane, can make the film be in the roll-in laminating state all the time at tensile in-process to improve the flat laminating effect of exhibition of film. Splayed line unwinding roller 20 is located the right side of press mold roller 19, splayed line unwinding roller pair roller 21 is located splayed line unwinding roller 20 under, film book pair roller 22 is located film reel 12 under, and the second is tailor sword 16 and is located between press mold roller 19 and splayed line unwinding roller 20. The squeeze film roller 19 can effectively keep the film 35 stretched out from the box body and the horizontal base surface in a bonding state all the time, and discharges and flattens air bubbles between the film 35 and the horizontal base surface under the rolling pressure of the squeeze film roller, so that the film can be smoothly bonded on the horizontal base surface. In addition, in the rolling and stretching process of the film, the splayed lines arranged on the splayed line unfolding roller 20 can play a role in unfolding and flattening the film 35 outwards, and the problems of wrinkling, overlapping and the like of the film in the stretching process can be effectively avoided.

Further, with reference to fig. 1, in other embodiments, the film winding device further includes a magnetic bottom plate 23 connected to the lower opening of the box body 1, and attached to the magnetic suction pieces 24 on the front and rear side plates of the box body 1, two ends of the splayed unwinding roller pair 21 and the film winding roller pair 22 are respectively and movably fixed on the magnetic bottom plate 23, and a handle for pulling out the magnetic bottom plate 23 is disposed on the magnetic bottom plate 23. The magnetic bottom plate is convenient for installing the film roll, replacing the film roll, cutting off the film roll after finishing film pasting, opening the bottom plate, and continuously pulling out the film for next film pasting.

Further, with reference to fig. 1, in other embodiments, an upper limit column 25 and a lower limit column 26 are respectively fixed on the side plates of the box body above and below the telescopic rod rotating shaft 2. The upper limiting column can ensure that the positioner and the telescopic rod cannot exceed the top surface of the box body in a releasing and rebounding state; and the lower limiting column can ensure that the positioner and the telescopic rod can not contact the film pressing roller in a stretching state, so that the work of the film pressing roller is prevented from being influenced.

Further, with continuing reference to fig. 1 and 5, in other embodiments, the film cutting device further includes two sets of beam mounting brackets 27, a beam 28, and a second spring 29, where the two sets of beam mounting brackets 27 are respectively fixed on inner walls of front and rear side plates of the box body 1, the beam 28 is horizontally disposed, and both the beam 28 and the attachment plate 15 have strip-shaped through holes, the beam 28 is movably connected to the attachment plate 15 after passing through the strip-shaped through holes through bolts and nuts, and the bolts can horizontally move in the strip-shaped through holes, so that the attachment plate 15 can move to some extent along front and rear directions of the box body 1, so as to cut the film 35. The both ends of crossbeam 28 are located respectively on the crossbeam mounting bracket 27 on the preceding, the posterior lateral plate of box 1, second spring 29 is located crossbeam mounting bracket 27, and the upper end and the crossbeam 28 of second spring 29 are connected, and the lower extreme and the bottom surface of crossbeam mounting bracket 27 of second spring 29 are connected to form the support to crossbeam 28, make attach board 15 and the unsettled lower part opening top at box 1 of second cutter 16. The upper part of the accessory plate 15 is also connected with a first handle 30, which is convenient for the use of the accessory plate 15. Through setting up the device of tailorring that constitutes by attaching board 15, second tailor sword 16, crossbeam mounting bracket 27, crossbeam 28 and second spring 29, accomplish after the shop membrane, the workman extends the hand to swash plate 14 department, presses attaching board 15 and removes about and, carries out the film cutting, and presses attaching board 15 downwards and accomplish the film cutting and tailor and can guarantee the planarization of film tail end, cuts the second after accomplishing under the spring action of second spring 29 and tailors sword 16 automatic suspension in the film top, uses simple and efficient.

Further, with reference to fig. 4, in other embodiments, an end of the circular rotating shaft 11 is provided with a mounting groove, the mounting groove is connected with a toroidal roller assembly, and the film reel 12 is located in the mounting groove and slidably connected with the toroidal roller assembly.

Further, with reference to fig. 1, in other embodiments, the reel fixing device further includes an elongated plate-shaped bottom clip 32 located in the lower port of the reel fixing bracket 9, and the bottom clip 32 is provided with a bolt hole through which a bolt passes to fix the bottom clip 32 to the side plate of the box 1. The main function of the bottom buckle 32 is that when the film roll is mounted on the upside down box body, the square shaft bracket 10 is not popped out of the scroll fixing bracket 9 by the first spring,

before use, the box body 1 is inverted and placed on the ground, the film 35 is drawn out from the film reel 12 and then flatly spread on the splayed spreading roller 20, then the film pressing roller 19 and the positioner 5 are stretched and pressed on the first magnetic suction strip 7 by the second magnetic suction strip 8, so that the film 35 is fixed on the outer edge surface of the positioner 5, the two splayed spreading roller pair rollers 21 and the film rolling pair roller 22 on the magnetic suction bottom plate 23 are respectively aligned with the film roll and the splayed spreading roller 20, and then the bottom plate 23 is closed.

When the film is laid, the device for covering the plastic film is placed on the surface of a plane base surface, the film 35 is fixed on the positioner 5 through the first magnetic attraction strip 7 and the second magnetic attraction strip 8, because the end of the film is not flat under general conditions, the film end can be loosened due to wind, wind and rain in the later maintenance period and then drives the whole film to be separated, therefore, after the film 35 is fixed on the positioner 5, the positioner 5 is pressed by the left hand after the film is fixed on the positioner 5, the box body is pulled by the right hand to move the covering film, after the maximum arm expansion is reached, the first cutting knife is moved by the left hand to move in the groove to cut off the film 35, after the covering film with the maximum arm expansion enables the film and the horizontal base surface to form certain self-adhesive force under the action of the maintenance agent, the positioner is lifted, the film cut by the flat end is smoothed out, the box body continues to move rightwards until the film is cut off after the covering film is finished, after the film covering of the maximum arm spreading enables the film, the horizontal base surface and the curing agent to have own adhering force, the film, the horizontal base surface and the curing agent do not need to be fixed by a positioner, the box body is directly pulled to continue film covering, after the whole film covering is completed, the film 35 is pressed by the film pressing roller, so that the film roll can be automatically driven to rotate in the motion composition of the box body 1, the film is flatly covered on the surface of the plane base body, after the film covering is completed, the cutting blade attached plate is pressed downwards from the inclined plane at the top end of the box body and is scratched to cut, and the film cutting is completed.

Finally, it should be understood that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.

Claims (10)

1. A device for rolling, unrolling, laying-flat and covering a plastic film on a planar substrate, comprising: the device comprises a box body, a telescopic rod rotating shaft, a telescopic rod extension spring, a positioner, a first cutting knife, a first magnetic attraction strip, a second magnetic attraction strip, a scroll fixing frame, a square shaft frame, a circular rotating shaft, a film scroll, a first spring, an inclined plate, an auxiliary plate, a second cutting knife, wheels and a driving roller; the box body is of a cuboid structure with an inner cavity and an opening at the bottom, and the two telescopic rod rotating shafts are symmetrically arranged and are respectively and movably connected to the outer surfaces of the front side plate and the rear side plate of the box body; the number of the telescopic rods is two, the two telescopic rods correspond to one telescopic rod rotating shaft respectively, and one end of each telescopic rod is connected to the telescopic rod rotating shaft; two ends of the extension spring of the telescopic rod are respectively connected with the side plate of the box body where the rotating shaft of the telescopic rod is located and the telescopic rod; the positioner is in a strip shape, two ends of the positioner are respectively connected to the other ends of the two telescopic rods, and the positioner is horizontally arranged; the first cutting knife in a long strip shape is connected in a groove at the lower part of the front wall surface of the positioner; the first magnetic attraction strip is fixed on the upper part of the front wall surface of the positioner, and the second magnetic attraction strip is used for being adsorbed on the first magnetic attraction strip; the scroll fixing frame is an inverted U-shaped groove, the front side plate and the rear side plate of the box body are respectively fixed with a scroll fixing frame, and the side plate area where the scroll fixing frame is located is hollow; the square shaft bracket is positioned in the scroll fixing bracket, and the round rotating shaft is fixed on the square shaft bracket; two ends of the film reel are respectively movably connected to the two circular rotating shafts, and the film reel is horizontally arranged; the upper end of the first spring is connected to the top of the scroll fixing frame, and the lower end of the first spring is connected to the top wall of the square scroll frame; the left side of the top plate of the box body is inclined downwards to form the inclined plate, the inclined plate is positioned at the upper left part of the scroll fixing frame, the auxiliary plate is vertically suspended in the box body, the upper end of the auxiliary plate penetrates through an upper opening of the inclined plate, and the auxiliary plate can move up and down along the box body; the second cutting knife is fixed at the lower end of the auxiliary plate; the wheels are connected to the bottom of the box body, and the driving roller is movably connected to the opening in the bottom of the box body.

2. The apparatus for rolling flat overlying plastic film on a planar substrate of claim 1 wherein said drive roller comprises: film pressing roller, splayed line expansion roller pair roller and film roll up the pair roller, wherein, the film pressing roller sets up in the lower left corner department of box, and the lower surface of film pressing roller extends to the outer back of bottom half and flushes with the lower surface of wheel, splayed line expansion roller is located the right side of film pressing roller, splayed line expansion roller pair roller is located splayed line expansion roller under, the film is rolled up the pair roller and is located the film spool under, and the second cutter is located between film pressing roller and the splayed line expansion roller.

3. The apparatus as claimed in claim 2, further comprising a magnetic bottom plate connected to the lower opening of the housing and respectively attached to the magnetic sheets on the front and rear side plates of the housing, wherein both ends of the splayed unrolling roller pair and the film rolling roller pair are respectively and movably fixed to the magnetic bottom plate; and the magnetic bottom plate is connected with a handle.

4. The apparatus according to claim 1, wherein the upper and lower positioning posts are fixed to the side plates of the housing above and below the rotation shaft of the extendable rod.

5. The device for rolling, unfolding and covering a plastic film on a planar substrate according to claim 1, further comprising two groups of beam mounting frames, beams and second springs, wherein the two groups of beam mounting frames are respectively fixed on the inner walls of the front side plate and the rear side plate of the box body, the beams and the auxiliary plates are respectively provided with strip-shaped through holes, the beams are movably connected to the auxiliary plates after penetrating through the strip-shaped through holes through bolts and nuts, and the bolts can horizontally move in the strip-shaped through holes; the both ends of crossbeam are located the crossbeam mounting bracket on the preceding, the posterior lateral plate of box respectively, the second spring is located the crossbeam mounting bracket, and the upper end and the crossbeam of second spring are connected, and the lower extreme of second spring is connected with the bottom surface of crossbeam mounting bracket to form the support to the crossbeam, make attach board and second cut out the unsettled lower part opening top at the box of sword.

6. The apparatus for rolling, unrolling and laying a plastic film on a planar substrate according to claim 1, characterised in that a first handle is attached to the upper portion of said attachment plate.

7. The apparatus according to claim 1, wherein spring fixing posts are connected to the lower surface of the top wall of the reel holder and the upper surface of the top wall of the square reel holder, and two ends of the first spring are respectively connected to the corresponding spring fixing posts.

8. The apparatus of claim 1, wherein the circular shaft has an end defining a mounting slot, the mounting slot having a roller assembly, the film spool being slidably engaged with the roller assembly in the mounting slot.

9. The apparatus for rolling, unrolling and laying a plastic film on a planar substrate according to claim 1, further comprising an elongated plate-like bottom snap fit in the lower port of said reel holder, the bottom snap fit being secured to the side plate of the housing.

10. The apparatus for rolling, unrolling and laying a plastic film on a planar substrate according to any one of claims 1-9 characterised in that a handle slot is provided on the right side surface of the top plate of the housing, in which a second handle is movably connected.

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