A film tearing device and a method for tearing a protective film

Abstract

The present invention provides a film tearing device and a method for tearing a protective film. The film tearing device includes a mounting plate, a first tape wheel, a second tape wheel, a tensioning mechanism, a reset mechanism, an adhesive application wheel, and a pressing mechanism. When tearing the film, it is only necessary to roll the adhesive application wheel from the corner of the protective film, then the protective film is rolled up together with the tape. After rolling to the position of the pressing wheel, the protective film is pressed by the pressing wheel and the adhesive application wheel, and then the film tearing device is lifted to tear the protective film from the surface of the product; it can quickly and conveniently tear the film, improving the operation efficiency. The tensioning mechanism and the reset mechanism ensure that the tape remains in a tensioned state to prevent the tape from wrinkling. After a single film tearing is completed, the tape can be smoothly reset, and the same tape section can be reused multiple times, saving the tape usage; when the adhesiveness of the same tape section decreases to the extent that it is not sufficient to smoothly tear the film, it is only necessary to rotate the second tape wheel to move the tape forward and replace it with a new tape section with reliable adhesiveness, and the operation is simple and convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of film separation, and particularly to a film tearing device and a method for tearing a protective film. Background Art

[0002] In order to protect the outer surface of a product from damage and enhance the appearance aesthetics, a protective film is usually pre-attached to the surface of the product. The adhesive on the back of the protective film usually uses a low-viscosity colloid or electrostatic adsorption. One is to facilitate tearing, and the other is to prevent residual glue from being left on the product surface. Although the adhesion between the protective film and the product is not strong, since the protective film fits completely on the product surface, it is not easy to find the starting point for tearing the protective film. For the fields where it is necessary to batch tear the protective film of products in the factory or batch tear the protective film of decorative panels after home decoration is completed, the final film tearing has become a time-consuming and laborious project. Summary of the Invention

[0003] In order to overcome the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide a film tearing device and a method for tearing a protective film.

[0004] To achieve the above object, the technical solution adopted by the present invention to solve its technical problems is: a film tearing device, including a mounting plate, a first tape wheel, a second tape wheel, a tensioning mechanism, a reset mechanism, an adhesive application wheel, and a pressing mechanism. The first tape wheel, the second tape wheel, and the adhesive application wheel are all installed on the mounting plate. The tape is transmitted from the first tape wheel through the tensioning mechanism and the adhesive application wheel and finally wound around the second tape wheel. The first tape wheel has a rotational torque, and the second tape wheel has a rotational torque. When applying the adhesive, the first tape wheel and the second tape wheel remain stationary. When applying the adhesive, the adhesive application wheel drives the tape to move along the adhesive application wheel towards the side where the second tape wheel is located. The pressing mechanism includes a pressing wheel and a pressing drive mechanism. The pressing drive mechanism drives the pressing wheel to press against and separate from the adhesive application wheel. The pressing position of the pressing wheel and the adhesive application wheel is located on the adhesive application wheel near the side of the second tape wheel. After the pressing drive mechanism is decompressed, the reset mechanism drives the tape to move along the adhesive application wheel towards the side where the first tape wheel is located.

[0005] Adopting the technical solution of the present invention, the adhesive force between the tape on the film tearing device and the surface protective film of the product to be torn is greater than the adsorption force or adhesive force between the protective film at the product corner and the product. It only needs to roll the tape-attaching wheel from the corner of the protective film, then the protective film is rolled up with the tape. After reaching the position of the rolling and pressing wheel, the protective film is pressed tightly by the pressing wheel and the tape-attaching wheel, and then the film tearing device is lifted to tear the protective film from the product surface; it can quickly and conveniently tear the film, improving the operation efficiency. The tensioning mechanism and the reset mechanism ensure that the tape remains in a tensioned state to prevent tape wrinkles. After a single film tearing is completed, the tape can be reset smoothly, and the same tape section can be reused multiple times, saving the tape consumption; when the adhesiveness of the same tape section decreases to the extent that it is not sufficient to tear the film smoothly, only need to rotate the second tape wheel, and the tape moves forward to replace a new tape section with reliable adhesiveness, and the operation is simple and convenient.

[0006] Further, the tensioning mechanism includes a swing arm plate, a first roller, a second roller and a third roller. The middle position of the swing arm plate is rotatably installed on the mounting plate through a rotation fulcrum. The first roller is installed at the middle position of the swing arm plate. The axis of the first roller is coaxial with the rotation axis of the swing arm plate. The second roller and the third roller are respectively installed at both ends of the swing arm plate. The tape roll is installed on the first tape wheel. After the tape is pulled out, it is transmitted through the first roller, the second roller, the tape-attaching wheel, the third roller in sequence and finally wound around the second tape wheel.

[0007] Further, the outer diameters of the second roller and the third roller are the same, and the distance between the axis of the second roller and the rotation axis of the swing arm plate is the same as the distance between the axis of the third roller and the rotation axis of the swing arm plate.

[0008] Further, the reset mechanism is a tension spring. One end of the tension spring is connected to the end of the swing arm plate near the third roller, and the other end of the tension spring is connected to the mounting plate. The tension spring generates a driving force on the swing arm plate to urge the second roller away from the tape-attaching wheel.

[0009] Adopting the above preferred solution, the tensioning mechanism and the reset mechanism complement each other, with a simple and ingenious structure, realizing the stable tensioning of the tape during the tape-attaching process and the smooth reset after the film tearing is completed.

[0010] Further, during tape attachment, the torque generated by the frictional force of the tape-attaching wheel on the tape on the swing arm plate is greater than the torque generated by the tension spring force on the swing arm plate.

[0011] Adopting the above preferred solution, it ensures that the swing arm plate can be smoothly self-adaptive during the tape-attaching process, realizes the tape release of the second roller and the tape collection of the third roller, and ensures that the tape remains tensioned.

[0012] Further, the extrusion driving mechanism includes a trigger, a connecting steel cable, a lever, and an elastic reset element. The trigger is rotatably mounted on the mounting plate. The connecting steel cable is connected between the trigger and the lever. The lever is rotatably mounted on the mounting plate. The extrusion wheel is mounted at one end of the lever through a connecting rod. The elastic reset element is connected between the lever and the mounting plate, and the elastic reset element generates a driving force that urges the extrusion wheel away from the adhesive wheel. After pulling the trigger, through the transmission of the connecting steel cable and the lever, the extrusion wheel presses against the adhesive wheel.

[0013] Further, a handle for convenient hand-held operation is also provided on the mounting plate.

[0014] With the above preferred solution, the trigger is installed at the front side position of the handle, which is convenient for the operator to operate.

[0015] Further, a torque adjustment mechanism for adjusting the magnitude of the rotational torque is also provided on the first tape wheel and the second tape wheel.

[0016] With the above preferred solution, it is convenient to adjust the torque of the two tape wheels, taking into account the position fixing effect during tape sticking and the feel of turning when changing the tape.

[0017] A method for removing a protective film includes the following steps:

[0018] Step 1: Press the adhesive wheel of the film tearing device against the corner of the product to be film-torn. The tape under the adhesive wheel adheres to the protective film on the product to be film-torn, and pull the film tearing device backward along the product surface.

[0019] Step 2: When the protective film at the corner of the product is rolled up with the tape and exceeds the position where the extrusion wheel is located, operate the extrusion driving mechanism. The extrusion wheel squeezes the protective film and the tape against the adhesive wheel, lift the film tearing device, and tear the protective film from the product.

[0020] Step 3: Release the extrusion driving mechanism and remove the protective film from the tape.

[0021] Step 4: Repeat Steps 1 - 3 to remove the protective film from other products to be film-torn. When the adhesiveness of the tape decreases and is not sufficient to stably roll up the protective film, proceed to Step 5;

[0022] Step 5: Turn the second tape wheel to move the tape forward as a whole, so that the highly adhesive part of the unused tape moves under the adhesive wheel, and then repeat Step 4.

[0023] With the above preferred solution, the efficiency of removing the protective film from the product is improved. Description of the Drawings

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] Figure 1 It is a schematic perspective view of an embodiment of the film tearing device of the present invention;

[0026] Figure 2 It is a front view of an embodiment of the film tearing device of the present invention;

[0027] Figure 3 It is a rear view of an embodiment of the film tearing device of the present invention;

[0028] Figure 4a 、 Figure 5a 、 Figure 6a 、 Figure 7b 、 Figure 8 、 Figure 9 It is a schematic diagram of the principle of the film tearing process of the present invention;

[0029] Figure 4b is Figure 4a The partial enlarged view at position A in

[0030] Figure 5b is Figure 5a The partial enlarged view at position B in

[0031] Figure 6b is Figure 6a The partial enlarged view at position C in

[0032] Figure 7b is Figure 7a The partial enlarged view at position D in

[0033] The names of the corresponding components represented by the numbers and letters in the figure:

[0034] 10 - mounting plate; 11 - first tape wheel; 12 - second tape wheel; 13 - tape sticking wheel; 14 - handle; 20 - tensioning mechanism; 201 - swing arm plate; 202 - first roller; 203 - second roller; 204 - third roller; 21 - reset mechanism; 30 - pressing mechanism; 301 - extrusion wheel; 302 - trigger; 303 - connecting steel rope; 304 - lever; 305 - elastic reset element; 40 - tape; 501 - product; 502 - protective film. Detailed implementation manners

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only a part rather than all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] As Figures 1-3 shown, in an implementation manner of the present invention, a film tearing device includes a mounting plate 10, a first tape wheel 11, a second tape wheel 12, a tensioning mechanism 20, a reset mechanism 21, an adhesive tape wheel 13, and a pressing mechanism 30. The first tape wheel 11, the second tape wheel 12, and the adhesive tape wheel 13 are all mounted on the mounting plate 10. The tape is transmitted from the first tape wheel 11 through the tensioning mechanism 20 and the adhesive tape wheel 13 and finally wound around the second tape wheel 12. The first tape wheel 11 has a rotational torque, and the second tape wheel 12 has a rotational torque. During film sticking, the first tape wheel 11 and the second tape wheel 12 remain stationary, and during film sticking, the adhesive tape wheel 13 drives the tape to move along the adhesive tape wheel 13 towards the side where the second tape wheel 12 is located. The pressing mechanism 30 includes a pressing wheel 301 and a pressing driving mechanism. The pressing driving mechanism drives the pressing wheel 301 to press against and separate from the adhesive tape wheel 13. The pressing position of the pressing wheel 301 and the adhesive tape wheel 13 is located on the side of the adhesive tape wheel 13 near the second tape wheel 12. After the pressing driving mechanism is decompressed, the reset mechanism 21 drives the tape to move along the adhesive tape wheel towards the side where the first tape wheel 11 is located.

[0037] The beneficial effects of adopting the above technical solutions are as follows: The adhesion between the tape on the film tearing device and the surface protective film of the product to be torn is greater than the adsorption force or adhesion between the protective film at the product corner and the product. Only by rolling the adhesive tape wheel from the corner of the protective film, the protective film will be rolled up with the tape. After rolling to the position of the pressing wheel, the protective film is pressed tightly by the pressing wheel and the adhesive tape wheel, and then the film tearing device is lifted to tear the protective film from the product surface; it can quickly and conveniently tear the film, improving the operation efficiency. The tensioning mechanism and the reset mechanism ensure that the tape remains in a tensioned state to prevent tape wrinkles. After a single film tearing is completed, the tape can be smoothly reset, and the same tape segment can be reused multiple times, saving tape usage; when the adhesion of the same tape segment decreases to the extent that it is not sufficient to smoothly tear the film, only need to rotate the second tape wheel, and the tape moves forward to replace a new tape segment with reliable adhesion, and the operation is simple and convenient.

[0038] As Figure 2As shown, in some other embodiments of the present invention, the tensioning mechanism 20 includes a swing arm plate 201, a first roller 202, a second roller 203, and a third roller 204. The middle position of the swing arm plate 201 is rotatably mounted on the mounting plate 10 via a rotation fulcrum. The first roller 202 is mounted at the middle position of the swing arm plate 201, and the axis of the first roller 202 is coaxial with the rotation axis of the swing arm plate 201. The second roller 203 and the third roller 204 are respectively mounted at both ends of the swing arm plate 201. The tape roll is mounted on the first tape pulley 11. After the tape is pulled out, it is sequentially transmitted through the first roller 202, the second roller 203, the tape sticking wheel 13, and the third roller 204 and finally wound around the second tape pulley 12. The outer diameters of the second roller 203 and the third roller 204 are the same, and the distance between the axis of the second roller 203 and the rotation axis of the swing arm plate 201 is the same as the distance between the axis of the third roller 204 and the rotation axis of the swing arm plate 201. The reset mechanism 21 is a tension spring. One end of the tension spring is connected to the near-third-roller end of the swing arm plate 201, and the other end of the tension spring is connected to the mounting plate 10. The tension spring generates a driving force on the swing arm plate 201 to urge the second roller 203 away from the tape sticking wheel 13. From Figure 4a state to Figure 5a state is the process of pulling the film tearing device backward from the edge of the product protective film. The tape sticking wheel 13 rolls backward along the surface of the product protective film, pulling the tape to drive the swing arm plate 201 to rotate slightly clockwise. While the second roller 203 moves downward, the third roller 204 moves upward to ensure that the tape always remains taut. From Figure 7a state to Figure 8 state is the process of releasing the trigger after the film tearing is completed and the pressing mechanism is decompressed. Since the pressing wheel releases the tape, the tension spring rotates the swing arm plate 201 counterclockwise. While the second roller 203 moves upward, the third roller 204 moves downward to ensure that the tape always remains taut. The beneficial effects of adopting the above technical solutions are as follows: The tensioning mechanism and the reset mechanism complement each other, with a simple and ingenious structure, realizing the stable tensioning of the tape during the tape sticking process and the smooth reset after the film tearing is completed.

[0039] In some other embodiments of the present invention, during tape sticking, the torque generated by the friction force of the tape sticking wheel on the tape on the swing arm plate is greater than the torque generated by the tension spring force on the swing arm plate. The beneficial effects of adopting the above technical solutions are as follows: Ensure that the swing arm plate can adapt smoothly during the tape sticking process, realize the tape release of the second roller and the tape collection of the third roller, and ensure that the tape remains taut.

[0040] Such as Figure 3As shown, in some other embodiments of the present invention, the extrusion driving mechanism includes a trigger 302, a connecting steel cable 303, a lever 304, and an elastic reset element 305. The trigger 302 is rotatably mounted on the mounting plate 10. The connecting steel cable 303 is connected between the trigger 302 and the lever 304. The lever 304 is rotatably mounted on the mounting plate 10. The extrusion wheel 301 is mounted at one end of the lever 304 via a connecting rod. The elastic reset element 305 is connected between the lever 304 and the mounting plate 10, and the elastic reset element 305 generates a driving force to urge the extrusion wheel 301 away from the adhesive wheel 13. After pulling the trigger 302, through the transmission of the connecting steel cable 303 and the lever 304, the extrusion wheel 301 is pressed against the adhesive wheel 13. A handle 14 for convenient hand-held operation is further provided on the mounting plate 10. The trigger 302 is mounted at the front side position of the handle 14, facilitating the operation of the operator.

[0041] In some other embodiments of the present invention, a torque adjustment mechanism for adjusting the magnitude of the rotational torque is further provided on the first tape wheel and the second tape wheel. The beneficial effect of adopting the above technical solution is that it is convenient to adjust the torques of the two tape wheels, taking into account the position fixing effect during adhesive application and the feel of turning when changing the adhesive.

[0042] The method for removing the protective film using the film tearing device of the present invention includes the following steps:

[0043] Step 1, press the adhesive wheel of the film tearing device against the corner of the product to be film-torn ( Figure 4a state shown in / 4b), the tape below the adhesive wheel adheres to the protective film on the product to be film-torn, and pull the film tearing device backward along the product surface ( Figure 5a state shown in / 5b);

[0044] Step 2, when the protective film at the corner of the product is rolled up with the tape and exceeds the position of the extrusion wheel, operate the extrusion driving mechanism, and the extrusion wheel presses the protective film and the tape against the adhesive wheel ( Figure 6a state shown in / 6b), lift the film tearing device, and tear the protective film from the product ( Figure 7a state shown in / 7b);

[0045] Step 3, release the extrusion driving mechanism, and remove the protective film from the tape ( Figure 8 state shown);

[0046] Step 4, repeat Steps 1 - 3 to remove the protective film from other products to be film-torn; when the adhesiveness of the tape decreases and is insufficient to stably roll up the protective film, proceed to Step 5;

[0047] Step 5, turn the second tape wheel ( Figure 9 state shown), move the tape as a whole forward, so that the highly adhesive part of the unused tape is moved below the adhesive wheel, and then repeat Step 4.

[0048] The above embodiments are only used to illustrate the technical concept and features of the present invention, and the purpose is to enable those of ordinary skill in the art to understand the content of the present invention and implement it. It is not intended to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A film tearing device, characterized in that, It includes a mounting plate, a first tape wheel, a second tape wheel, a tensioning mechanism, a reset mechanism, a tape pasting wheel and a pressing mechanism. The first tape wheel, the second tape wheel and the tape pasting wheel are all mounted on the mounting plate. The tape is transmitted from the first tape wheel through the tensioning mechanism and the tape pasting wheel and finally wound around the second tape wheel. The first tape wheel has a rotational torque, and the second tape wheel has a rotational torque. During tape pasting, the first tape wheel and the second tape wheel remain stationary. When pasting the tape, the tape pasting wheel drives the tape to move along the tape pasting wheel towards the side where the second tape wheel is located. The pressing mechanism includes a pressing wheel and a pressing driving mechanism. The pressing driving mechanism drives the pressing wheel to press against and separate from the tape pasting wheel. The pressing position of the pressing wheel and the tape pasting wheel is located on the side of the tape pasting wheel near the second tape wheel. After the pressing driving mechanism is decompressed, the reset mechanism drives the tape to move along the tape pasting wheel towards the side where the first tape wheel is located. The tensioning mechanism includes a swing arm plate, a first roller, a second roller and a third roller. The middle position of the swing arm plate is rotatably mounted on the mounting plate through a rotation fulcrum. The first roller is mounted at the middle position of the swing arm plate. The axis of the first roller is coaxial with the rotation axis of the swing arm plate. The second roller and the third roller are respectively mounted at both ends of the swing arm plate. The tape roll is mounted on the first tape wheel. After the tape is pulled out, it is transmitted through the first roller, the second roller, the tape pasting wheel, the third roller in sequence and finally wound around the second tape wheel. The reset mechanism is a tension spring. One end of the tension spring is connected to the end of the swing arm plate near the third roller, and the other end of the tension spring is connected to the mounting plate. The tension spring generates a driving force that urges the second roller to move away from the tape pasting wheel for the swing arm plate. Torque adjusting mechanisms for adjusting the magnitude of the rotational torque are further provided on the first tape wheel and the second tape wheel.

2. The film tearing device according to claim 1, wherein The outer diameters of the second roller and the third roller are the same, and the distance between the axis of the second roller and the rotation axis of the swing arm plate is the same as the distance between the axis of the third roller and the rotation axis of the swing arm plate.

3. The film tearing device according to claim 1, characterized in that, During tape pasting, the torque generated by the friction force of the tape pasting wheel on the tape on the swing arm plate is greater than the torque generated by the tension of the tension spring on the swing arm plate.

4. The film tearing device according to claim 1, wherein, The pressing driving mechanism includes a trigger, a connecting steel rope, a lever and an elastic reset element. The trigger is rotatably mounted on the mounting plate. The connecting steel rope is connected between the trigger and the lever. The lever is rotatably mounted on the mounting plate. The pressing wheel is mounted at one end of the lever through a connecting rod. The elastic reset element is connected between the lever and the mounting plate. The elastic reset element generates a driving force that urges the pressing wheel to move away from the tape pasting wheel. After pulling the trigger, through the transmission of the connecting steel rope and the lever, the pressing wheel presses against the tape pasting wheel.

5. The film tearing device according to claim 1, characterized in that, A handle for convenient hand-held operation is further provided on the mounting plate.

6. A method for removing a protective film, characterized in that, Using the film tearing device according to any one of claims 1-5, it includes the following steps: Step 1, press the tape pasting wheel of the film tearing device against the corner of the product to be film torn. The tape below the tape pasting wheel is bonded to the protective film on the product to be film torn. Pull the film tearing device backward along the product surface. Step 2, when the protective film at the corners of the product is rolled up with the tape and exceeds the position where the pressing wheel is located, operate the pressing drive mechanism, and the pressing wheel presses the protective film and the tape onto the tape sticking wheel. Lift the film tearing device and tear the protective film from the product; Step 3, release the pressing drive mechanism and remove the protective film from the tape; Step 4, repeat Steps 1-3 to tear the protective films of other products to be film-torn; when the adhesiveness of the tape decreases and is insufficient to stably roll up the protective film, proceed to Step 5; Step 5, turn the second tape wheel to move the tape as a whole forward, so that the highly adhesive part of the unused tape is moved under the tape sticking wheel, and then repeat Step 4.

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