LED display screen film pasting device and film pasting method

Abstract

A film pasting device for an LED display screen comprises a first conveying belt, a second conveying belt and a film pasting device, a rolled film fixing roller and a rolled film conveying roller are arranged above the second conveying belt; the roll film fixing roller is used for placing a roll film, and the roll film conveying roller is used for pulling the roll film and conveying the roll film to the film pasting roller; the first conveying belt and the second conveying belt are connected end to end, and a lifting film breaking device is arranged between the first conveying belt and the second conveying belt. Through mutual cooperation of the first conveying belt, the second conveying belt, the rolled film fixing roller, the rolled film conveying roller, the film pasting roller and the lifting film breaking device, automatic film pasting of the display screen can be completed, operation such as film pulling, film pasting and film cutting does not need to be conducted by workers any more, and the film pasting efficiency is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of peripheral accessories of electronic equipment, and in particular to a film pasting device and a film pasting method for an LED display screen. Background Art

[0002] LED display screens are used in various electronic devices, such as computers, machine tools, mobile phones, etc. Manufacturers of LED display screens usually need to transport the screens to the corresponding purchasers after producing them. In order to prevent the screens from being scratched during transportation, a protective film is usually attached to the surface of the screen. However, the existing film attachment method usually requires manual film attachment and cutting, which is inefficient and the quality of the film attachment cannot be guaranteed.

[0003] How to improve the efficiency of applying protective films to display screens and ensure the quality of the films is a technical problem that needs to be solved urgently in this field. Summary of the invention

[0004] The purpose of the present invention is to provide a film-sticking device for an LED display screen, which can complete automatic film sticking for the display screen through the mutual cooperation of a first conveyor belt, a second conveyor belt, a film rolling fixing roller, a film rolling conveying roller, a film sticking roller and a lifting and film cutting device, and does not require workers to perform operations such as pulling the film, sticking the film, and cutting the film, thereby effectively improving the film sticking efficiency.

[0005] The present invention provides a film-sticking device for an LED display screen, comprising: A first conveyor belt, wherein a film-laminating roller is disposed at the end of the first conveyor belt; A second conveyor belt, above which a film roll fixing roller and a film roll conveying roller are arranged; the film roll fixing roller is used to place the film roll, and the film roll conveying roller is used to pull the film roll and convey the film roll to the film sticking roller; The first conveyor belt and the second conveyor belt are connected end to end, and a lifting and film cutting device is arranged between the first conveyor belt and the second conveyor belt.

[0006] Furthermore, a film pressing roller is arranged above the second conveyor belt.

[0007] Furthermore, it also includes a display screen alignment component, which is arranged on both sides of the first conveyor belt and located in front of the film sticking roller.

[0008] Furthermore, the display screen alignment assembly includes a push block, which is connected to a first telescopic cylinder; driven by the first telescopic cylinder, the push block reciprocates in a direction perpendicular to the movement direction of the first conveyor belt, and the push block is located in front of the film-laminating roller.

[0009] Furthermore, it also includes a film cutting device, which is arranged on both sides of the second conveyor belt.

[0010] Furthermore, the film cutting device includes a rotating film cutting knife, which is connected to the second telescopic cylinder. Driven by the second telescopic cylinder, the rotating film cutting knife reciprocates in a direction perpendicular to the movement direction of the second conveyor belt, and the rotating film cutting knife is located in front of the film pressing roller.

[0011] Furthermore, the surface of the laminating roller is made of foam material.

[0012] Furthermore, the lifting film cutting device includes a film cutting knife arranged on a knife seat, and a third telescopic cylinder is arranged below the knife seat: the film cutting knife reciprocates in the vertical direction under the drive of the third telescopic cylinder.

[0013] Furthermore, there are multiple lifting and film cutting devices, and the multiple lifting and film cutting devices are arranged in parallel between the first conveyor belt and the second conveyor belt.

[0014] The present invention also provides a method for applying film to an LED display screen, comprising the following steps: S1, installing the roll film on the roll film fixing roller, and winding the roll film around the roll film conveying roller and then onto the film pasting roller, so that the free end of the roll film is located below the film pasting roller; S2, the first conveyor belt transports the display screen to be film-coated to the film-coating roller to complete the film-coating, and transports the display screen with the film-coated to the second conveyor belt; S3, the second conveyor belt receives the display screen with film attached; S4, after the display screen with the film attached completely reaches the second conveyor belt, the lifting and film cutting device rises and completes the film cutting.

[0015] The technical effect of the technical solution is that the present invention can complete the automatic film pasting of the display screen through the mutual cooperation of the first conveyor belt, the second conveyor belt, the film fixing roller, the film conveying roller, the film pasting roller and the lifting and film cutting device, and there is no need for workers to perform operations such as pulling the film, pasting the film, and cutting the film, which effectively improves the film pasting efficiency and liberates manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. The drawings in the following description are only for some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 The overall structure schematic diagram of the LED display screen film sticking device according to the embodiment of the present application is shown; Figure 2 It shows a schematic diagram of the structure of the lifting and breaking film device in the embodiment of the present application; Figure 3 A schematic diagram showing the principle of the push block in the embodiment of the present application to correct the angle of the display screen; Figure 4 A schematic diagram showing the steps of a method for applying film to an LED display screen according to an embodiment of the present application is shown.

[0018] Description of the drawings: 1-first conveyor belt; 2-film sticking roller; 3-second conveyor belt; 4-film roll fixing roller; 5-film roll conveying roller; 6-lifting and film cutting device; 7-film pressing roller; 8-push block; 9-first telescopic cylinder; 10-rotating film cutting knife; 11-second telescopic cylinder; 12-film cutting knife; 13-knife holder; 14-third telescopic cylinder. DETAILED DESCRIPTION

[0019] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0022] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0024] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of the present invention.

[0025] In the following description, suffixes such as "module", "component", "assembly" or "unit" are used only to facilitate the description of the present invention and have no specific meanings. Therefore, they can be used in combination.

[0026] The present invention will be further described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0027] According to one embodiment of the present invention, Figure 1 As shown, a film-sticking device for an LED display screen includes: A first conveyor belt 1, wherein a film-laminating roller 2 is disposed at the end of the first conveyor belt 1; A second conveyor belt 3, above which a film fixing roller 4 and a film conveying roller 5 are arranged; the film fixing roller 4 is used to place the film roll, and the film conveying roller is used to pull the film roll and convey the film roll to the film sticking roller 2; The first conveyor belt 1 and the second conveyor belt 3 are connected end to end, and a lifting and film cutting device 6 is arranged between the first conveyor belt 1 and the second conveyor belt 3.

[0028] When the film pasting device of this embodiment is used for film pasting, the roll film is firstly sleeved on the roll film fixing roller 4, which is in the shape of a roller, and then the roll film is passed around from the bottom of the roll film conveying roller 5, pulled to the film pasting roller 2, and passed from the top of the film pasting roller 2 to the bottom. The roll film fixing roller 4 is located at a higher position, and the two ends of the roll film fixing roller 4 are connected to the frame through bearings to ensure that it can rotate. The roll film fixing roller 4 is an unpowered roller, which will only rotate when an external force pulls the roll film; the roll film conveying roller 5 is a powered roller, and its surface is made of elastic rubber material, and there is a certain friction between it and the roll film. When the roll film conveying roller 5 rotates, it can pull the roll film; the film pasting roller 2 can be a powered roller or an unpowered roller, preferably a powered roller, and the linear speed of its surface is the same as the linear speed of the first conveyor belt 1.

[0029] The LED display screen to be laminated is initially located on the first conveyor belt 1, and is driven by the first conveyor belt 1 to approach the film laminating roller 2. The surface of the film laminating roller 2 is also made of elastic rubber. When the display screen passes under the film laminating roller 2, the film laminating roller 2 applies the roll film to the display screen by rotating the film. The display screen itself has a certain length and width. When the display screen completely passes under the film laminating roller 2, the roll film is completely attached to the display screen; at this time, the front end of the display screen is located on the second conveyor belt 3, and the rear end is still on the first conveyor belt 1; the first conveyor belt 1 and the second conveyor belt 3 have the same linear speed.

[0030] After the screen with film attached completely reaches the second conveyor belt 3, or the tail of the screen passes over the lifting and cutting device 6, the lifting and cutting device 6 rises to cut the film roll. The second conveyor belt 3 continues to transport the screen with film attached to the tail, and the staff at the tail only needs to pick up the screen with film attached.

[0031] The present invention can complete automatic film pasting for the display screen through the mutual cooperation of the first conveyor belt 1, the second conveyor belt 3, the film rolling fixing roller 4, the film rolling conveying roller 5, the film pasting roller 2 and the lifting and film cutting device 6. Workers are no longer required to perform operations such as film pulling, film pasting and film cutting, which effectively improves the film pasting efficiency and frees up manpower.

[0032] Furthermore, in this embodiment, a film pressing roller 7 is also provided above the second conveyor belt 3. Since the lifting and film cutting device 6 cuts the film by exerting force from bottom to top, it may cause the protective film at the tail of the display screen that has been pasted to be partially separated from the display screen. Therefore, in this embodiment, a film pressing roller 7 is provided above the second conveyor belt 3. When the display screen reaches the second conveyor belt 3, the film pressing roller 7 will press the protective film back to the surface of the display screen again. Furthermore, the horizontal distance from the film pressing roller 7 to the lifting and film cutting device 6 is less than the length of the display screen in this direction. In this way, when the lifting and film cutting device 6 rises to cut the roll film, the display screen is already in a state of being pressed by the film pressing roller 7, and the pasted protective film will not be completely lifted up; further, in this example, the surface of the film pressing roller 7 is a foam material. After the film is cut, the film pressing roller 7 rolls again from the surface of the display screen pasted with the protective film, which helps to eliminate the bubbles that may exist in the initial film pasting, thereby improving the film pasting quality. In this embodiment, the film pressing roller 7 is a powered roller, and the surface linear velocity is equal to the linear velocity of the second conveyor belt 3.

[0033] According to one embodiment of the present invention, Figure 1 As shown, in this embodiment, the LED display screen film pasting device further includes a display screen alignment component, which is arranged on both sides of the first conveyor belt 1 and located in front of the film pasting roller 2. The display screen alignment component includes a push block 8, which is connected to the first telescopic cylinder 9; driven by the first telescopic cylinder 9, the push block 8 reciprocates in a direction perpendicular to the movement direction of the first conveyor belt 1, and the push block 8 is located in front of the film pasting roller 2. In this example, the push block is T-shaped.

[0034] In this embodiment, a push block 8 is provided to correct the angle of the display screen. Figure 3 As shown, when the display screen delivered from the first conveyor belt 1 is tilted, the push blocks 8 on both sides of the first conveyor belt 1 can push the edge of the display screen driven by the first telescopic cylinder 9 to correct the tilt of the display screen, thereby further ensuring the quality of the film pasting.

[0035] According to one embodiment of the present invention, as shown in the figure, in this embodiment, the film-sticking device for an LED display screen further includes a film-cutting device, which is arranged on both sides of the second conveyor belt 3. The film-cutting device includes a rotating film-cutting knife 10, which is connected to a second telescopic cylinder 11. Driven by the second telescopic cylinder 11, the rotating film-cutting knife 10 reciprocates in a direction perpendicular to the moving direction of the second conveyor belt 3, and the rotating film-cutting knife 10 is located in front of the film-pressing roller 7.

[0036] When the axial dimension of the roll film is larger than the width of the display screen, redundant margin films will be formed on both sides of the display screen after film application. These margin films will reduce the adhesion of the film on the display screen, especially in the process of vertical placement for transportation. Therefore, in the prior art, the margin films are usually cut off manually. In the present invention, a rotary film cutting knife 10 is arranged on both sides of the second conveyor belt 3. When there is margin film, the margin film is cut by the rotary film cutting knife 10. In this embodiment, the rotary film cutting knife 10 is connected to the second telescopic cylinder 11, and the telescopic length of the second telescopic cylinder 11 can be adjusted to adapt to the film cutting of display screens of different sizes.

[0037] According to one embodiment of the present invention, in this embodiment, if Figure 2 As shown, the lifting and film cutting device 6 includes a film cutting knife 12 arranged on a knife seat 13, and a third telescopic cylinder 14 is arranged below the knife seat 13: the film cutting knife 12 is driven by the third telescopic cylinder 14 to reciprocate in the vertical direction. A groove is arranged between the first conveyor belt 1 and the second conveyor belt 3, and the lifting and film cutting device 6 is arranged in the groove. When film cutting is not required, the film cutting knife 12 is located in the groove, lower than the conveying plane of the first conveyor belt 1 and the second conveyor belt, so as to avoid scratching the back of the display screen. When film cutting is required, the film cutting knife is driven by the third telescopic cylinder 14 to extend from the groove to cut the film.

[0038] To facilitate installation and replacement, in this embodiment, the number of the lifting and film cutting devices 6 is multiple, and the multiple lifting and film cutting devices 6 are arranged in parallel between the first conveyor belt 1 and the second conveyor belt 3. Since the film cutting knife is required to be very sharp, its process is relatively difficult and usually expensive. However, if it is partially damaged, it needs to be directly replaced with a new one, which will cause the use cost of the LED display film pasting device to be too high. Therefore, this embodiment adopts a design method of breaking the whole into parts. When the blade of one of the film cutting knives is damaged, it is only necessary to replace the film cutting knife, without replacing all the film cutting knives. It is beneficial to reduce the use cost of the film pasting device.

[0039] Furthermore, the shape of the film cutting knife can be a common blade shape or a cone shape; in addition, the film cutting knife can also be replaced by a row of parallel sharp needles.

[0040] The present invention also provides a method for applying film to an LED display screen, such as Figure 4 As shown, the following steps are included: S1, installing the roll film on the roll film fixing roller, and winding the roll film around the roll film conveying roller and then onto the film pasting roller, so that the free end of the roll film is located below the film pasting roller; S2, the first conveyor belt transports the display screen to be film-coated to the film-coating roller to complete the film-coating, and transports the display screen with the film-coated to the second conveyor belt; S3, the second conveyor belt receives the display screen with film attached; S4, after the display screen with the film attached completely reaches the second conveyor belt, the lifting and film cutting device rises and completes the film cutting. In the description of the specification, the description with reference to the terms "one embodiment", "some embodiments", "an embodiment", "some embodiments", "an example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A film-sticking device for an LED display screen, characterized in that: include: A first conveyor belt, wherein a film-laminating roller is disposed at the end of the first conveyor belt; A second conveyor belt, above which a film roll fixing roller and a film roll conveying roller are arranged; the film roll fixing roller is used to place the film roll, and the film roll conveying roller is used to pull the film roll and convey the film roll to the film sticking roller; The first conveyor belt and the second conveyor belt are connected end to end, and a lifting and film cutting device is arranged between the first conveyor belt and the second conveyor belt.

2. The LED display screen film sticking device according to claim 1, characterized in that: A film pressing roller is also arranged above the second conveyor belt.

3. The LED display screen film sticking device according to claim 2, characterized in that: It also includes a display screen alignment component, which is arranged on both sides of the first conveyor belt and in front of the film sticking roller.

4. The LED display screen film sticking device according to claim 3, characterized in that: The display screen alignment assembly includes a push block, which is connected to a first telescopic cylinder. Driven by the first telescopic cylinder, the push block reciprocates in a direction perpendicular to the movement direction of the first conveyor belt, and the push block is located in front of the film-laminating roller.

5. The LED display screen film sticking device according to claim 3, characterized in that: It also includes a film cutting device, which is arranged on both sides of the second conveyor belt.

6. The LED display screen film sticking device according to claim 5, characterized in that: The film cutting device includes a rotating film cutting knife, which is connected to the second telescopic cylinder. Driven by the second telescopic cylinder, the rotating film cutting knife reciprocates in a direction perpendicular to the movement direction of the second conveyor belt. The rotating film cutting knife is located in front of the film pressing roller.

7. The LED display screen film sticking device according to claim 2, characterized in that: The surface of the film pressing roller is made of foam material.

8. The LED display screen film sticking device according to claim 1, characterized in that: The lifting film cutting device comprises a film cutting knife arranged on a knife seat, and a third telescopic cylinder is arranged below the knife seat: the film cutting knife performs reciprocating motion in the vertical direction under the drive of the third telescopic cylinder.

9. The LED display screen film sticking device according to claim 8, characterized in that: There are multiple lifting and film cutting devices, and the multiple lifting and film cutting devices are arranged in parallel between the first conveyor belt and the second conveyor belt.

10. A method for applying film to an LED display screen according to any one of claims 1 to 7, characterized in that: The steps include: S1, installing the roll film on the roll film fixing roller, and winding the roll film around the roll film conveying roller and then onto the film pasting roller, so that the free end of the roll film is located below the film pasting roller; S2, the first conveyor belt transports the display screen to be film-coated to the film-coating roller to complete the film-coating, and transports the display screen with the film-coated to the second conveyor belt; S3, the second conveyor belt receives the display screen with film attached; S4, after the display screen with the film attached completely reaches the second conveyor belt, the lifting and film cutting device rises and completes the film cutting.

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