JP2008209530A - Method for peeling adhesive film and peeling device therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To peel an adhesive film by setting a peeling angle to reduce the peeling force to the minimum upon peeling the adhesive film so as to render the surface of an adhesion object uniform, in particular, to suppress display irregularity due to gap fluctuation in a liquid crystal display panel and to improve display quality. <P>SOLUTION: A method for peeling an adhesive film is provided for peeling an adhesive film 3 stuck to the adhesion surface of an adhesion object 2; wherein upon peeling the adhesive film 3, a peeling plate 5 stuck to the peeled surface of the adhesive film 3 is moved in a direction parallel to the peeled surface of the adhesion object 2 as well as the film is peeled by keeping the peeling and pulling direction of the adhesive film 3 at a predetermined angle larger than 90 degrees with respect to the peeled surface of the adhesion object 2. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a pressure-sensitive adhesive film peeling method and a peeling device therefor, and more particularly, to a pressure-sensitive adhesive film peeling method and a peeling device for uniformly peeling a pressure-sensitive adhesive film or the like attached to an adhesive surface of an adherend.

  Generally, in a liquid crystal display device, a polarizing plate is attached to a liquid crystal display panel with an adhesive. When this polarizing plate is attached to a liquid crystal display panel, if dust adheres to the surface of the liquid crystal display panel or is scratched, the polarizing plate is peeled off to remove the dust, and then again. It is necessary to paste a beautiful polarizing plate. In addition, when the polarizing plate is peeled off, a spherical spacer or the like is generally arranged on the liquid crystal display panel. Therefore, when the polarizing plate is peeled off, the liquid crystal display is arranged so that the arrangement of the spherical spacer or the like does not move. It is necessary to avoid applying excessive force to the panel surface as much as possible. That is, it is necessary to make the peeling force for peeling the polarizing plate as small as possible.

  In such a case, a polarizing plate peeling apparatus for peeling the polarizing plate by various methods has been put into practical use. In addition, when such a peeling apparatus is generalized, it can be considered as an adhesive film peeling apparatus having a polarizing plate as an adhesive film and a liquid crystal display panel as an adherend. As this type of peeling device, for example, the adhesive film peeling device disclosed in JP-A-8-292433 (hereinafter referred to as Patent Document 1) employs a structure called a clamping mechanism.

  As shown in the front view of FIG. 5, this adhesive film peeling apparatus includes a set table 1a on which a liquid crystal display panel (adhered body) to which a polarizing plate (adhesive film) is bonded is placed, and a winding for winding the polarizing plate. The take roller 32 is the main configuration. The pinching mechanism 33 is configured to pinch and hold the end portion of the polarizing plate at the tip of the winding roller 32.

  In FIG. 5, an adherend such as a liquid crystal display panel is set on the set table 1a. The adherend is held in a state where an adhesive film (laminated film, polarizing plate, or the like) attached to the adhesion surface of the adherend is exposed on the outer surface.

  The table mounting base 20 has a reverse concave slider 21 for removably mounting the set table 1a and reciprocating the table mounting base 20 on the lower surface thereof. The peeling device base 12a is provided with a table support portion 11a up to the reciprocating range of the table mounting base 20, and a convex rail portion 22 for fitting with the slider 21 at the tip of the table support portion 11a. The table mounting base 20 can be reciprocated by fitting the slider 21 to the rail portion 22.

  Further, a driving motor 23 is disposed on the peeling device base 12 a, one end of a shaft 25 is connected to a rotating shaft of the motor 23 via a coupling 24, and a pinion 26 is attached to the other end of the shaft 25. A rack 27 that meshes with the pinion 26 is attached to the table mounting base 20 via a mounting material 28, and the table mounting base 20 can be moved by driving the drive motor 23.

  Further, the lower end side of the connecting block 30 that holds the shaft 25 without transmitting the rotational force of the drive motor 23 by the bearing 29 is attached to the shaft 25. A winding roller 32 as a peeling means is attached to the upper end of the connection block 30 via a bearing 31, and a clamping mechanism 33 that clamps the adhesive film 3 is provided at one end of the winding roller 32.

  A pulley 34 is attached to the other end of the winding roller 32, and the pulley 34 and the pulley 35 attached to the shaft 25 are connected by a timing belt 36. As a result, the pulley 35 rotates following the drive motor 23, the pulley 34 rotates via the timing belt 36 due to the rotation of the pulley 35, and the winding roller 32 rotates following the rotation of the pulley 34.

  Then, one end of a cylinder 37 that moves the winding roller 32 up and down is attached to the lower end of the connecting block 30, and the other end of the cylinder 37 is fixed to the peeling device base 12 a. The roller 32 can move up and down. In the clamping mechanism 33, a fixed-side clamping piece and a movable-side clamping piece are attached to one end of the winding roller 32 by a pin, and the tip of the adhesive film 3 is clamped by the fixed-side clamping piece and the movable-side clamping piece.

  Next, operation | movement of an adhesive film peeling apparatus is demonstrated. First, as shown in FIG. 6, an operator peels off one corner portion of the adhesive film 3 attached on the adherend 2 by using a peeling tool 40 such as a cutter. Next, as shown in FIG. 7, the adhesive film 3 is set on the set table 1 a with the outer surface exposed, and the table is mounted so that the set table 1 a is inclined by about 45 ° with respect to the reciprocating direction of the table mounting base 20. Set on stand 20.

  As shown in FIG. 7, the cylinder 37 is first fixed on the extrusion side, and the connecting block 30 stands upright. When the fixing of the cylinder 37 is released, the connecting block 30 moves in the direction of the arrow H by its own weight and approaches the set table 1a. Next, with the connecting block 30 lowered to the set table 1a side by its own weight, the peeled adhesive film 3 is positioned on the holding surface of the fixed side holding piece, and the movable side holding piece of the holding mechanism 33 is closed, The peeled adhesive film 3 is clamped.

  Thereafter, when the drive motor 23 is driven, the pinion 26 and the take-up roller 32 rotate in the direction in which the adhesive film 3 is peeled off, and at the same time, the rack 27 moves, and the panel set stage 1 and the take-up roller 32 are synchronized. Then, the adhesive film 3 is wound around the winding roller 32 and peeled off.

  In this prior art, when the liquid crystal panel (2) is set on the set table 1a and the polarizing plate (3) is peeled off, it is wound up by the clamping mechanism 33. Therefore, as shown in FIG. 8, since the adhesive film (polarizing plate) 3 was wound up by the winding roller 32 or the like, the peeling angle was substantially vertical (90 °).

  Japanese Patent Application Laid-Open No. 2006-299064 (hereinafter referred to as Patent Document 2) shows an adhesive film peeling apparatus for winding an adhesive film (polarizing plate) 3. This peeling apparatus also winds and peels the adhesive film using a winding roller. In this case, the peeling angle is almost vertical (90 °). Japanese Patent Application Laid-Open No. 2006-10762 (hereinafter referred to as Patent Document 3) discloses a peel device in which a peel roller is lifted by a transfer sheet (adhesive film) so that the peeling angle is constant. In this case, the peeling angle is several tens of degrees, which is considerably smaller than 90 °.

JP-A-8-292433 (FIG. 1, paragraph numbers “0035” to “0058”) JP 2006-299064 A (FIG. 2, paragraph numbers “0013” to “0018”) Japanese Patent Laying-Open No. 2006-10762 (FIG. 5, paragraph numbers “0015” to “0019”)

  However, in these prior arts, although the peeling angle at which the adhesive film (polarizing plate) 3 is wound by the winding roller 32 or the like is constant, it is almost vertical (90 °) or an angle of 90 ° or less. It was. At these angles, the peel force becomes larger than the peel angle at which the peel force is the smallest, and a force in the direction of peeling the adhesive film from the adherend is applied, so the surface of the adherend is not evenly peeled off. There was a problem.

  For example, when a polarizing plate attached to a liquid crystal display panel is peeled off, a variation in peeling force or peeling speed causes a striped pattern or gap variation on the liquid crystal display area surface of the liquid crystal display panel, resulting in display unevenness. The display may be adversely affected.

  The main object of the present invention is to provide a pressure-sensitive adhesive film peeling method that improves the display quality by making the surface of the adherend uniform by suppressing the peeling angle at which the peeling force is minimized, suppressing display unevenness due to gap fluctuation, and It is in providing the peeling apparatus.

  In the pressure-sensitive adhesive film peeling method for peeling the pressure-sensitive adhesive film attached to the adhesion surface of the adherend, the release plate is formed by attaching the peeled surface of the pressure-sensitive adhesive film when peeling the pressure-sensitive adhesive film. Is moved in a direction to peel in parallel with the peeled surface of the adherend, and the direction in which the adhesive film is peeled and pulled is set at a predetermined angle greater than 90 ° with respect to the face from which the adherend is peeled off. It is characterized by peeling in such a way as to keep it at a constant value.

  In the present invention, the predetermined angle can be set to 110 ° to 140 ° to reduce the peeling force of the adhesive film, and an auxiliary roller is inserted between the peeling plate and the adherend. The predetermined angle can be adjusted by pressing the peeled surface of the adhesive film against the peeling plate by the rotation of the auxiliary roller.

  In another embodiment of the present invention, in the pressure-sensitive adhesive film peeling apparatus for peeling the pressure-sensitive adhesive film attached to the adhesion surface of the adherend provided on the table, the pressure-sensitive adhesive film was peeled when the pressure-sensitive adhesive film was peeled off. Between the peeling plate and the adherend on the table, the peel plate capable of moving in a direction to peel parallel to the peeled surface of the adherend on the table, The peeling plate is provided with an auxiliary roller that presses the peeled surface of the pressure-sensitive adhesive film by rotation, and the peeled plate and the auxiliary roller are used to peel and peel the pressure-sensitive adhesive film, so that the adherend is peeled off. It is characterized by adjusting so as to keep a predetermined angle larger than 90 °.

  In the present invention, the predetermined angle is 110 ° to 140 °, the peeling force can be reduced, and the peeling plate can be placed and the peeling plate can be regulated and moved in the peeling direction. And a roller guide part provided in parallel to the rail part below the rail part and restricting the movement of the auxiliary roller.

  As described above, according to the present invention, the polarizing plate is sandwiched between the peeling plate to which the pressure-sensitive adhesive film is peeled and the auxiliary roller that presses the pressure-sensitive adhesive film, so that the peeling angle at which the peeling force is minimized is kept constant. Can be peeled off. Accordingly, there is an effect that the influence of the gap variation on the surface of the peeled surface of the adherend can be reduced. In particular, in the case of a liquid crystal display panel, the occurrence of display unevenness due to gap fluctuation can be reduced, and the display quality can be improved.

Next, embodiments of the present invention will be described with reference to the drawings. 1 is a partially crushed plan view of an adhesive film peeling apparatus according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the front side (aa portion) of FIG. 1, and FIG. 3 is a side view of FIG. -B part) It is sectional drawing. As shown in FIG. 1, the pressure-sensitive adhesive film peeling apparatus peels a pressure-sensitive adhesive film 3 such as a polarizing plate attached to an adhesive surface of an adherend 2 such as a liquid crystal panel with an adhesive.
In this embodiment, when peeling the adhesive film 3, the peeled surface 5 of the pressure-sensitive adhesive film 3 is attached, and the peeling plate 5 is moved in the direction of peeling parallel to the peeled surface of the adherend 2. When peeling the adhesive film 3, it has the moving means which moves the peeling board 5 so that the angle from which peeling force becomes small may be maintained at the predetermined angle larger than 90 degrees, It is characterized by the above-mentioned.

  As shown in FIG. 2, the adhesive film peeling apparatus includes a suction table 1, an auxiliary roller 4, an auxiliary roller guide 10, a peeling plate 5, a rail support portion 6, a rail portion 7, a slider 8, and an auxiliary device. It comprises a roller guide groove 9, a suction table support part 11, and a peeling device base 12.

  The adherend 2 of the liquid crystal panel is sucked and held by the suction table 1 as shown in FIG. As shown in FIG. 2, the suction table 1 is fixed by a suction table support portion 11 fixed to the peeling device base 12. A pressure-sensitive adhesive film 3 of a polarizing plate is attached to the adherend 2 with an adhesive. The adhesive film 3 is peeled off by being attached to the peeling plate 5. That is, the peeling plate 5 peels the pressure-sensitive adhesive film 3 by attaching the pressure-sensitive adhesive film 3 and moving in the direction of peeling parallel to the peeled surface of the adherend 2.

  As shown in FIGS. 2 and 3, the peeling plate 5 is provided with a slider 8 for fitting to the rail portion 7 at the lower portion thereof. The rail portion 7 is fixed to the rail support portion 6, and the rail support portion 6 is a peeling device. It is fixed to the base 12. The slider 8 can move on the rail portion 7 in a certain direction (peeling direction). The slider 8 can be driven by an arbitrary drive means (drive motor). For example, a slider can be driven by providing a drive motor and a rack and pinion mechanism on the slider 8, or it can be driven externally by a drive motor using a rack and pinion mechanism as in Patent Document 1. it can. Therefore, the peeling plate 5 is attached to the slider 8 and can move on the rail portion 7 in a certain direction.

  An auxiliary roller 4 is inserted between the peeling plate 5 and the suction table 1. The auxiliary roller 4 has an auxiliary roller guide 10 at the center of the axis, and the auxiliary roller guide 10 is inserted into the auxiliary roller guide groove 9 at the end of the auxiliary roller 4. The auxiliary roller guide groove 9 is provided on the lower side of the rail portion 7 in parallel with the rail portion 7. Therefore, the auxiliary roller 4 operates to move in parallel with the rail portion 7 while being regulated by the auxiliary roller guide groove 9 in accordance with the peeling operation of the adhesive film 3. The auxiliary roller 4 has a function of pressing the peeled surface of the adhesive film 3 against the peeling plate 5 while rotating.

  When the adhesive film 3 is peeled off, first, the adherend 2 such as a liquid crystal panel is set on the suction table 1 so that the auxiliary roller 4 is inclined about 45 ° with respect to the peeling direction B as shown in FIG. . And the end of the adhesion film 3 on the to-be-adhered body 2 is peeled with peeling tools, such as a cutter. Then, the paste surface side of the peeled adhesive film 3 is attached to the back surface of the release plate 5. At that time, the pressure-sensitive adhesive film 3 is adhered to the peeling plate 5 while being in contact with and pressed against the auxiliary roller 4.

  When this pressure-sensitive adhesive film 3 is attached to the peeling plate 5, the position of the auxiliary roller 4 is adjusted to peel off the peeled angle (peeling angle) between the surface of the adherend 2 and the peeled surface of the pressure-sensitive adhesive film 3. It is necessary to set so that the predetermined angle A at which the force is the smallest is obtained.

  The inventor of the present invention has confirmed that the predetermined peeling angle A at which the peeling force is smallest is 110 ° to 140 °. That is, when the surface of the adherend 2 and the peeled surface of the pressure-sensitive adhesive film 3 are set at such an angle and peeled, the peeling force is minimized.

  In this state, if the peeling plate 5 is moved in the peeling direction on the rail portion 7, the adhesive film 3 on the adherend 2 is sequentially placed on the peeling plate 5 with the help of the auxiliary roller 4. Affixed and peeled off.

  According to the configuration of the present embodiment, the peeling force is minimized by sandwiching the adhesive film 3 between the peeling plate 5 to which the adhesive film 3 to be peeled off and the auxiliary roller 4 that presses the adhesive film. It becomes possible to peel the polarizing plate while maintaining the peeling angle, and therefore it is possible to suppress the gap fluctuation on the surface of the adherend 2. In particular, in the case of a liquid crystal display device, occurrence of display unevenness due to such gap fluctuation can be reduced.

  Next, the polarizing plate peeling method of the first embodiment will be described with reference to FIG. First, the adherend 2 of the panel to which the adhesive film 3 of the polarizing plate is attached is sucked and held on the suction table 1. At that time, the auxiliary roller 4 is set to be inclined by about 45 ° with respect to the peeling direction B of the adherend 2. Next, as shown in FIG. 6, for example, one end of the adhesive film 3 of the polarizing plate is peeled off using a peeling tool such as a cutter.

  Next, the surface side of one end of the peeled adhesive film 3 is brought into contact with the auxiliary roller 4. Further, the peeling plate 5 is moved to the position of the auxiliary roller 4. Next, the pressure-sensitive adhesive film 3 is pulled to adjust the peeling angle A to be 110 ° to 140 °, the surface of the pressure-sensitive adhesive film 3 to which the paste is applied is attached to the peeling plate 5, and the auxiliary roller 4 is attached. Hold firmly between the peeling plate 5 and the suction table 1.

  Next, when the peeling plate 5 is continuously moved in the peeling direction B, the adhesive film 3 can be peeled while keeping the peeling angle A as shown in FIG. Therefore, since the adhesive film 3 can be peeled with a small peel force, there is an advantage that the occurrence of gap fluctuations on the peel surface of the adherend 2 can be reduced.

  Examples of utilization of the present invention include a polarizing plate peeling device for a liquid crystal panel and a polarizing plate peeling device for a liquid crystal panel after a peripheral substrate is connected.

It is the top view which fractured | ruptured partially the adhesive film peeling apparatus explaining one Embodiment of this invention. It is sectional drawing of the front side (aa part) of the peeling apparatus of FIG. It is sectional drawing of the side surface side (bb part) of the peeling apparatus of FIG. It is the side view to which the peeling part of the peeling apparatus of FIG. 1 was expanded. It is a front view of the peeling apparatus of a prior art example. It is the front view which began to peel off the adhesive film by the peeling tool of a prior art example. It is a side view when attaching the adhesive film of the peeling apparatus of FIG. It is a side view explaining the peeling part by the peeling apparatus of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Adsorption table 1a Set table 2 To-be-adhered body 3 Adhesive film 4 Auxiliary roller 5 Release plate 6 Rail support part 7,22 Rail part 8 Slider 9 Roller guide groove 10 Roller guide 11, 11a Table support part 12, 12a Device base 20 Table Mounting base 21 Slider 23 Drive motor 24 Coupling 25 Shaft 26 Pinion 27 Rack 28 Mounting material 29, 31 Bearing 30 Connection block 32 Winding roller 33 Holding mechanism 34, 35 Pulley 36 Timing belt 37 Cylinder 40 Stripping tool

Claims (6)

In the pressure-sensitive adhesive film peeling method for peeling the pressure-sensitive adhesive film attached to the bonding surface of the adherend,
When peeling the pressure-sensitive adhesive film, the peeling plate with the peeled surface of the pressure-sensitive adhesive film is moved in a direction to peel parallel to the peeled surface of the adherend, and the pressure-sensitive adhesive film is peeled off. A pressure-sensitive adhesive film peeling method, wherein the pulling direction is kept at a predetermined angle larger than 90 ° with respect to the surface from which the adherend is peeled. The pressure-sensitive adhesive film peeling method according to claim 1, wherein the predetermined angle is 110 ° to 140 ° so that the peeling force is reduced. An auxiliary roller is inserted between the peeling plate and the adherend, and the predetermined angle is adjusted by pressing the peeled surface of the adhesive film against the peeling plate by rotation of the auxiliary roller. The adhesive film peeling method of description. In the pressure-sensitive adhesive film peeling apparatus for peeling the pressure-sensitive adhesive film attached to the adhesion surface of the adherend provided on the table,
When peeling off the pressure-sensitive adhesive film, the peelable surface of the pressure-sensitive adhesive film is affixed, and a peelable plate that can move in the direction of peeling parallel to the peeled surface of the adherend on the table, and the peelable plate And an auxiliary roller that presses the peeled surface of the pressure-sensitive adhesive film on the release plate by rotation between the adherend and the adherend on the table,
The direction in which the pressure-sensitive adhesive film is peeled and pulled by the peeling plate and the auxiliary roller is adjusted so as to be maintained at a predetermined angle larger than 90 ° with respect to the surface from which the adherend is peeled off. An adhesive film peeling device. The pressure-sensitive adhesive film peeling apparatus according to claim 4, wherein the predetermined angle is set to 110 ° to 140 ° so that the peeling force is reduced. A rail portion on which the release plate is placed and the release plate can be regulated and moved in the release direction; and a roller guide portion that is provided in parallel with the rail portion on the lower side of the rail portion and regulates the movement of the auxiliary roller; The adhesive film peeling apparatus according to claim 4 or 5, comprising:

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