JP2015178408A - Peeling apparatus and peeling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a separation device that enables a polarizing plate to be separated from a base plate, while restraining the polarizing plate from being torn, and a separation method.SOLUTION: A separation device 1 includes a stage member 3 for being loaded with a laminate, and a separation member 5 by which one end of a polarizing plate 33 separated from the laminate is held and which is rotated to further sequentially separate the polarizing plate. At least one of the laminate and the separation member can be rotated in the direction of eliminating a difference between tensile forces between both ends of a boundary part between the polarizing plate separated from the laminate and the polarizing plate not having been separated yet.

Description

  The present invention relates to a peeling apparatus and a peeling method used for peeling a polarizing plate from a laminate.

  Conventionally, a liquid crystal display panel, an organic EL display panel, and the like are known as panels applied to an image display unit of an image display device. These panels use a laminate having a substrate formed of a hard glass plate or the like and a polarizing plate (polarizing film) bonded to one surface or both front and back surfaces of the substrate via an adhesive. .

  This type of liquid crystal display panel or the like is manufactured by adhering a polarizing plate to a substrate, and is inspected after manufacturing. In this inspection, there may be a case where problems such as contamination or breakage of the bonded polarizing plate, mixing of air or foreign matter between the polarizing plate and the substrate are discovered. In this case, the polarizing plate is peeled off from the liquid crystal display panel or the like, so that the obtained substrate is reused for manufacturing another liquid crystal display panel or the like. Such peeling of the polarizing plate is generally called rework.

By the way, the peeling apparatus used in order to peel a polarizing plate from such a laminated body is proposed. For example, while sandwiching the laminate as an electro-optical panel in a vertical manner so as to vibrate, it is placed on a stage so as to be able to vibrate in the horizontal direction, and one end of the polarizing plate peeled off from the substrate of the laminate is wound, for example. There has been proposed a peeling device that winds around a take-off roller, winds the peeled polarizing plate while moving the stage in the peeling direction with a take-up roller, and peels the polarizing plate. According to this peeling apparatus, while the surface on the polarizing plate side of the liquid crystal display panel is pressed by the pressing roller, the peeled polarizing plate is curved along the peripheral surface of the pressing roller, and the curved polarizing plate is rotated. Are sequentially wound by a winding roller. By this winding, the polarizing plate is further peeled off via the pressing roller, and the peeled polarizing plate is wound up sequentially.
Thus, in the peeling device provided with the pressing roller, the winding force of the winding member is converted into a force for peeling the polarizing plate through the pressing roller. Moreover, since the polarizing plate is peeled off while applying vibration, peeling becomes easy.

JP 2009-29561 A

However, as is generally well known, a polarizing plate bonded to a substrate in a liquid crystal display panel is not originally intended to be peeled off. That is, the polarizing plate is bonded to the substrate with a much stronger adhesive force than in the case where one film is bonded to another member on the assumption that it is originally peeled off.
For this reason, when the polarizing plate is peeled off using the peeling device, the polarizing plate is peeled against the strong adhesive force, so that at least one end of the portion where the polarizing plate is peeled off by the strong adhesive force. In this case, the polarizing plate may be torn. When the polarizing plate is torn, it becomes necessary to separate the remaining polarizing plate separately, so that it is difficult to peel the entire polarizing plate.

  This invention makes it a subject to provide the peeling apparatus and peeling method which make it possible to peel a polarizing plate from a board | substrate, suppressing that a polarizing plate tears in view of the said situation.

  The inventors of the present invention have intensively studied the reason why the polarizing plate is torn in the peeling device of Cited Document 1, and when the polarizing plate is peeled from the laminate with the peeling device, the polarizing plate is still peeled from the laminated body. It has been found that the tension is different between both ends of the boundary portion (exfoliation starting point) with the non-polarizing plate, and the polarizing plate tends to tear at the end where the tension is relatively large. Based on this knowledge, further earnestly researched and found that the polarizing plate can be prevented from tearing by making at least one of the laminate and the peeling member rotatable in a direction to eliminate the difference in tension. It came to complete.

That is, the peeling apparatus according to the present invention is
A peeling device for peeling the polarizing plate from a laminate having a substrate and a polarizing plate bonded to the substrate,
A stage member on which the laminate is placed;
A peeling member that further sequentially peels off the polarizing plate while holding one end of the polarizing plate peeled off from the laminate.
At least one of the laminate and the peeling member rotates in a direction to eliminate the difference in tension between both ends of the boundary between the polarizing plate peeled from the laminated body and the polarizing plate that has not yet been peeled off. It is configured to be possible.

According to such a configuration, when the polarizing plate is peeled off from the substrate, when the balance of tension is lost between both ends of the boundary portion, that is, when the tension at one end becomes higher than the tension at the other end, the laminate And at least one can peel in the direction which eliminates the above-mentioned tension difference among peeling members. Thereby, it can suppress that a polarizing plate tears resulting from this tension difference.
Therefore, it is possible to peel the polarizing plate from the substrate while preventing the polarizing plate from tearing.

Moreover, in the peeling apparatus having the above configuration,
At least one of the laminate and the peeling member rotates in a direction to eliminate the difference in tension according to the difference in tension between both ends of the boundary portion, and the difference in tension is rotated in the at least one of the layers. It is preferable to convert to force.

  According to such a configuration, when the balance of tension is lost between both ends of the boundary portion, that is, when the tension at one end is higher than the tension at the other end, at least one of the laminate and the peeling member has the above tension. By rotating in the direction of elimination according to the difference, the tension difference can be converted into a rotational force. Thereby, since the difference in tension is eliminated, it is possible to prevent the polarizing plate from being broken due to the difference in tension.

Moreover, in the peeling apparatus having the above configuration,
Of the laminate and the peeling member, it is preferable that the laminate is configured to be rotatable in a direction to eliminate the difference in tension on a virtual plane parallel to the laminate.

  According to such a configuration, the laminate can be rotated in a direction that eliminates the difference in tension on a virtual plane parallel to the laminate, so that the peeling member can be easily and more easily than the case where the peelable member is rotatable. It is possible to reliably prevent the polarizing plate from tearing.

Moreover, in the peeling apparatus having the above configuration,
A plate-like peeling auxiliary member that guides the polarizing plate to the peeling member while the peeled polarizing plate is wound,
The peeling auxiliary member is
A bottom surface portion disposed along a surface of the laminate on the polarizing plate side;
It is preferable that the front edge is formed in a curved surface, and has a front end portion that curves the peeled polarizing plate along the front edge and guides it to the peeling member.

According to such a configuration, the polarizing plate is peeled from the substrate using the peeling assisting member, thereby peeling the polarizing plate through the tip portion and the bottom portion, and the peeled polarizing plate is removed from the tip edge of the tip portion. And can be guided to the rear end side. This makes it possible to guide the peeled polarizing plate to the rear end side while more reliably suppressing the polarizing plate from tearing.
In addition, because the peeling assisting member is plate-shaped, the tension applied to the tip when being peeled is distributed to the remaining part (rear part), so compared to the roller-like peeling assisting member Thus, bending of the peeling assisting member due to the tension is suppressed. Thereby, since the balance of the tension applied to the peeling assisting member is prevented from being lost, problems such as the tearing of the polarizing plate due to the loss of the balance are suppressed.
Furthermore, since the peeling assisting member is difficult to bend as described above, the peeling assisting member is relatively excellent in durability.
In addition, since the peeling assisting member is excellent in durability as described above, the radius of curvature of the tip can be made relatively small as compared with the roller-shaped peeling assisting member. Thereby, the balance of the tension applied to the peeling assisting member is prevented from being lost, and the substrate is prevented from cracking.
Therefore, it is possible to peel the polarizing plate from the substrate while more reliably suppressing the polarizing plate from tearing.

Moreover, in the peeling apparatus having the above configuration,
It is preferable that the peeling assisting member further includes an inclined portion that is inclined from the front end portion toward the rear end side and away from the bottom surface portion.

According to such a configuration, since the peeling assisting member has the inclined portion, the peeled polarizing plate is guided to the rear end side by the inclined portion after being guided by the leading end portion. It becomes possible. That is, the path of the peeled polarizing plate that has passed through the tip can be maintained at a predetermined angle by the inclined portion. Thereby, since the fluctuation | variation of the said angle of the peeled polarizing plate can be suppressed, the fluctuation | variation of the tension | tensile_strength concerning the front-end | tip part resulting from this fluctuation | variation can be suppressed.
Therefore, since the balance of the tension applied to the peeling assisting member is further prevented from being broken, it is possible to more surely prevent the polarizing plate from tearing.

Moreover, in the peeling apparatus having the above configuration,
It is preferable that the laminated body is fixed on the stage member and is configured to be rotatable together with the stage member in a direction to eliminate the tension difference.

  According to such a configuration, the laminated body is fixed on the stage member and can rotate in a direction to eliminate the tension difference together with the stage member, thereby suppressing friction between the laminated body and the stage member. Therefore, the laminate can rotate stably. Thereby, it can suppress more reliably that a polarizing plate tears.

Moreover, in the peeling apparatus having the above configuration,
It is preferable that the peeling member is a take-up member that winds up one end of the polarizing plate that has been peeled off from the laminate, while winding the polarizing plate further in order by rotating the polarizing plate.

  According to this configuration, since the peeling member is the winding member, the peeled polarizing plate can be wound up sequentially, which is efficient. In addition, for example, when the polarizing plate is gripped and peeled, tension is applied to the portion once gripped until the peeling is completed. Since the peeling member is a winding member, the polarizing plate is prevented from tearing in the vicinity of the peeling member, as compared with the peeling member holding and peeling the polarizing plate. Can do.

Moreover, the peeling method of the present invention comprises:
On the stage member, a placing step of placing a laminate having a substrate and a polarizing plate bonded to the substrate;
A holding step of peeling one end of the polarizing plate and holding the one end by a peeling member;
At least one of the laminated body and the peeling member is rotated in a direction to eliminate a difference in tension between both ends of a boundary portion between the polarizing plate peeled from the laminated body and the polarizing plate not yet peeled. And a peeling step of peeling the polarizing plate from the laminate by further sequentially peeling the polarizing plate by the peeling member.

According to such a configuration, when the polarizing plate is peeled from the substrate, when the balance of tension is lost between both ends of the boundary portion, that is, when the tension at one end is higher than the tension at the other end, the laminate and At least one of the peeling members can be rotated in a direction to eliminate the tension difference. Thereby, it can suppress that a polarizing plate tears resulting from this tension difference.
Therefore, it is possible to peel the polarizing plate from the substrate while preventing the polarizing plate from tearing.

Moreover, in the peeling method of the said structure,
In the peeling step, at least one of the laminate and the peeling member is rotated in a direction to eliminate the tension difference in accordance with a tension difference between both ends of the boundary portion, and the difference in tension is determined. It is preferable to convert to the at least one rotational force.

  According to such a configuration, when the balance of tension is lost between both ends of the boundary portion, that is, when the tension at one end is higher than the tension at the other end, at least one of the laminate and the peeling member is The tension difference can be converted into a rotational force by rotating in the direction of elimination according to the tension difference. Thereby, since the difference in tension between the both ends is eliminated, it is possible to prevent the polarizing plate from being broken due to the difference in tension.

Moreover, in the peeling method of the said structure,
In the peeling step,
Of the laminate and the release member, the laminate is preferably rotated in a direction to eliminate the tension difference on a virtual plane parallel to the laminate.

  According to such a configuration, by rotating the laminate in a direction that eliminates the difference in tension on a virtual plane parallel to the laminate, it is easier and more reliable than when the peeling member rotates. It can suppress that a polarizing plate tears.

Moreover, in the peeling method of the said structure,
In the peeling step,
A plate having a bottom surface portion arranged along a surface on the polarizing plate side of the laminate, and a tip portion having a tip edge formed in a curved shape and curving the peeled polarizing plate along the tip edge. The peeling plate is further peeled sequentially by the peeling member while guiding the peeled polarizing plate to the peeling member while curving the peeled polarizing plate along the tip edge by using a strip-like peeling auxiliary member. It is preferable to peel the polarizing plate from the laminate.

According to such a configuration, the polarizing plate is peeled from the substrate using the peeling assisting member, thereby peeling the polarizing plate through the tip portion and the bottom portion, and the peeled polarizing plate is removed from the tip edge of the tip portion. And can be guided to the rear end side. Thereby, it becomes possible to guide to the said rear end side, suppressing more reliably that a polarizing plate is torn.
In addition, since the peeling assisting member is plate-shaped, the tension applied to the tip when being peeled is distributed to the remaining part (rear part), so that compared to the roller-like peeling assisting member, Bending of the peeling assisting member due to the tension is suppressed. Thereby, since the balance of the tension applied to the peeling assisting member is prevented from being lost, problems such as tearing of the polarizing plate due to the loss of the balance are suppressed.
Furthermore, since the peeling assisting member is difficult to bend as described above, the peeling assisting member is relatively excellent in durability.
In addition, since the peeling assisting member is excellent in durability as described above, the radius of curvature of the tip can be made relatively small as compared with the roller-shaped peeling assisting member. Thereby, the balance of the tension applied to the peeling assisting member is prevented from being lost, and the substrate is prevented from cracking.
Therefore, it is possible to peel the polarizing plate from the substrate while more reliably suppressing the polarizing plate from tearing.

Moreover, in the peeling method of the said structure,
The peeling assisting member further includes an inclined portion that is inclined from the front end portion toward the rear end side and away from the bottom surface portion,
It is preferable that the polarizing plate guided along the leading edge is further guided to the peeling member along the inclined portion.

According to such a configuration, since the peeling assisting member has the inclined portion, the peeled polarizing plate is guided to the rear end side by the inclined portion after being guided by the leading end portion. It becomes possible. That is, the path of the peeled polarizing plate that has passed through the tip can be maintained at a predetermined angle by the inclined portion. Thereby, since the fluctuation | variation of the said angle of the peeled polarizing plate can be suppressed, the fluctuation | variation of the tension | tensile_strength concerning the front-end | tip part resulting from this fluctuation | variation can be suppressed.
Therefore, since the balance of the tension applied to the peeling assisting member is further prevented from being broken, it is possible to more surely prevent the polarizing plate from tearing.

Moreover, in the peeling method of the said structure,
In the placing step, the laminated body is fixed on the stage member,
In the peeling step, it is preferable to rotate the laminated body together with the stage member when the laminated body is rotated in a direction to eliminate the tension difference among the laminated body and the peeling member.

  According to this configuration, by fixing the laminate on the stage member and rotating the laminate in a direction to eliminate the tension difference, the friction between the laminate and the stage member can be suppressed. The laminate can be stably rotated. Thereby, it can suppress more reliably that a polarizing plate tears.

Moreover, in the peeling method of the said structure,
As the peeling member, a winding member is used,
In the holding step, one end of the polarizing plate is peeled off and wound around the winding member,
In the peeling step, it is preferable that the polarizing plate is peeled from the laminated body by winding the polarizing plate while sequentially peeling the polarizing plate with the winding member.

  According to such a configuration, the peeled polarizing plate can be wound up sequentially by peeling off the polarizing plate by the winding member, which is efficient. Also, for example, when a polarizing plate is gripped and peeled off without being wound, tension is applied to the gripped portion until the peeling is completed, but when peeling is performed using a winding member, the polarizing plate Since the portion where the tension is applied is sequentially changed by winding, by peeling while winding with the winding member, in the vicinity of the peeling member as compared with the aspect of gripping and peeling the polarizing plate. It can suppress that a polarizing plate tears.

  As described above, according to the present invention, there are provided a peeling apparatus and a peeling method capable of peeling a polarizing plate from a substrate while preventing the polarizing plate from tearing.

The schematic side view which shows the peeling apparatus of 1st Embodiment of this invention. Schematic top view showing the peeling apparatus of this embodiment The schematic top view which shows that the stage member with which the peeling apparatus of this embodiment was equipped is rotatable. Schematic top view showing an example of tension applied to the polarizing plate Schematic top view showing an example of the state where tension applied to the polarizing plate is eliminated Schematic top view showing another example of a state where tension is applied to the polarizing plate Schematic top view showing another example of the state where tension applied to the polarizing plate is eliminated Schematic side view showing a state in which one end portion of the peeled polarizing plate is wound around the winding member Schematic side view showing a state in which the peeled polarizing plate is sequentially wound while the polarizing plate is further peeled by the rotation of the winding member Schematic side view showing a state in which all the polarizing plates are peeled off by the rotation of the winding member Schematic side view showing an example of a layer configuration of a laminate to which the peeling apparatus and the peeling method of the present embodiment are applied The schematic side view which shows an example of the laminated constitution of a polarizing plate among the laminated bodies of FIG. The schematic side view which shows the peeling apparatus of 2nd Embodiment of this invention. The schematic side view which shows the peeling auxiliary member with which the peeling apparatus of this embodiment was equipped. Schematic side view showing a state in which the polarizing plate is peeled from the laminate when the radius of curvature of the tip of the peeling assisting member is relatively large Schematic side view showing a state where the polarizing plate is peeled from the laminate when the radius of curvature of the tip of the peeling assisting member is relatively small The schematic side view which shows the peeling apparatus of other embodiment of this invention. The schematic side view which shows the peeling apparatus of other embodiment of this invention. Schematic top view showing the peeling apparatus of this embodiment Schematic side view showing a state where the polarizing plate is further peeled off by the peeling member

  First, a peeling apparatus according to an embodiment of the present invention will be described.

  A stage member 3 on which a laminated body 30 having a substrate 31 and a polarizing plate 33 bonded on one surface 31a (see FIG. 11) of the substrate 31 is placed, and the polarizing plate peeled off from the laminated body And a peeling member 5 that sequentially peels the polarizing plate while further peeling the polarizing plate. Further, the peeling device 1 is configured such that at least one of the laminated body 30 and the peeling member 5 is a boundary portion between the polarizing plate 33 peeled from the laminated body 30 and the polarizing plate 33 that has not yet been peeled (a portion serving as a peeling start point). ) It is configured to be rotatable in a direction to eliminate the difference in tension F (F1, F2) between both ends of S (see FIGS. 4 to 7).

Specifically, in the peeling device 1, the laminated body 30 is fixed to the stage member 3, and the laminated body 30 of the laminated body 30 and the peeling member 5 is placed on the parallel virtual plane A together with the stage member 3. It is configured to be rotatable in a direction to eliminate the difference in tension F.
More specifically, the peeling device 1 is configured such that, as the peeling member 5, one end portion 33b of the polarizing plate 33 peeled from the laminate 30 and curved by the peeling auxiliary member 7 is wound and rotated to rotate the polarizing plate. A take-up member 5 is provided for sequentially winding 30 while further peeling off 30.
The peeling apparatus 1 further includes a supporting member 40 that rotatably supports the stage member 3 and a peeling assisting member 7.

  The peeling device 1 is disposed between the winding member 5 and the peeling auxiliary member 7, presses the laminated body 30 toward the stage member 3, and is sandwiched between and supported by the stage member 3. A member 9 is further provided. The peeling apparatus 1 is disposed on the opposite side of the winding member 5 (left side of the peeling auxiliary member 7 in FIG. 1) with the peeling auxiliary member 7 interposed therebetween, and the substrate 31 exposed by peeling the polarizing plate 33 is staged. A second support member 11 that presses against the member 3 and is supported by being sandwiched between the stage member 3 is further provided.

  Further, the peeling device 1 includes a winding member 5, a peeling auxiliary member 7, a first support member 9, and a second support member 11 that are not shown separately from the stage member 3 and are not shown. Is fixed in the peeling apparatus 1.

  The stage member 3 is a member on which the stacked body 30 is placed until all the polarizing plates 33 are peeled from the stacked body 30. In the present embodiment, a stage member 3 on which the laminate 30 can be fixed is adopted. The stage member 3 is, for example, a plate-like member having a through hole through which air passes, and the laminate 30 is attached to the stage member 3 by sucking air through the through hole (air adsorption). The laminated body 30 is configured to be fixed to the stage member 3. Moreover, the aspect in which the laminated body 30 is fixed to the stage member 3 is not particularly limited. In the present invention, the stage member 3 is not particularly limited to this embodiment, and it is sufficient that the stacked body 30 can be placed thereon.

  In the present embodiment, the laminated body 30 is configured to be freely rotatable around the rotation axis R on the virtual plane A parallel to the laminated body 30 together with the stage member 3. More specifically, the stage member 3 to which the stacked body 30 is fixed is configured to be freely rotatable around the rotation axis R. That is, as will be described below, the stage member 30 is configured to be relatively freely rotatable about the rotation axis R with respect to the support member 40 that supports the stage member 3.

The support member 40 supports the stage member 3 rotatably. The support member 40 includes a main body 41 that is a main body thereof, and a rotation member 43 that is disposed on the upper surface of the main body 41 and is rotatably supported by the main body 41. Then, the stage member 3 is fixed to the upper surface of the rotating member 43 so that the stage member 3 is rotated with respect to the supporting member 40.
Further, the support member 40 is moved in the peeling direction X, and the stage member 3 and the laminate 30 are moved with the movement of the support member 40.

The winding member 5 as the peeling member 5 is wound around one end portion 33b of the peeled polarizing plate 33, and rotates around the rotation axis along the longitudinal direction of the winding member 5 in this state. The polarizing plate 33 is sequentially wound while further peeling.
Examples of such a winding member 5 include a roller that rotates by being driven by a driving device 17 such as a motor.
In this embodiment, the winding member 5 is fixedly arranged in the peeling apparatus 1 by the fixing member (configured not to perform rotation to eliminate the tension difference).
Further, one end portion 33b of the peeled polarizing plate 33 is fixed to the winding member 5 with an adhesive tape (not shown) or the like.
2 shows a state where the polarizing plate 33 is peeled off together with the pressure-sensitive adhesive layer 35 (see FIG. 11).

The first support member 9 is disposed between the take-up member 5 and the peeling assisting member 7, presses the laminated body 30 toward the stage member 3, and is sandwiched and supported by the stage member 3. Is. The first support member 9 suppresses the laminate 30 (and the exposed substrate 31) from floating from the stage member 3 when the polarizing plate 33 is peeled off by winding the winding member 5. The polarizing plate 33 is more easily peeled off.
As such a 1st supporting member 9, a rubber roller is mentioned, for example.

The second support member 11 is disposed on the opposite side of the winding member 5 with the peeling assisting member 7 interposed therebetween, and presses the substrate 31 exposed by peeling the polarizing plate 33 against the stage member 3. The stage member 3 is sandwiched and supported. With this second support member 11, when the polarizing plate 33 is peeled off by winding the winding member 5, the exposed substrate 31 (and the laminate 30 together with the substrate 31) may float from the stage member 3. It is suppressed. Thereby, the polarizing plate 33 becomes easier to peel off.
As such a 2nd supporting member 11, a rubber roller is mentioned, for example.

The winding member 5, the peeling auxiliary member 7, the first support member 9 and the second support member 11 are arranged at predetermined positions in the peeling direction X (longitudinal direction of the stage member 3) and the upper surface of the stage member 3 (the upper surface thereof). Are fixed by the fixing member at a predetermined position (height) in a direction perpendicular to ().
In the present embodiment, the winding member 5, the peeling auxiliary member 7, the first support member 9 and the second support member 11 are fixed at predetermined positions in the peeling apparatus 1, so that the stage The member 3 moves relatively in the peeling direction X.

The peeling auxiliary member 7 guides the polarizing plate 33 to the take-up member 5 while the peeled polarizing plate 33 is wound. The separation of the polarizing plate 33 is assisted. In the present embodiment, the peeling assisting member 7 is formed in a roller shape.
Examples of the material for forming the peeling assisting member 7 include stainless steel materials, carbon tool steel materials, high-speed tool steel materials, chromium steel materials, chromium molybdenum steel materials, manganese steel materials, and other alloy materials and ceramic materials. Further, the peeling assisting member 7 may be hollow or solid.

According to the peeling apparatus 1 of the present embodiment, when the polarizing plate 33 is peeled from the substrate 31, when the balance of the tension F is lost between both ends of the boundary portion S, that is, the tension F1 (or F2) at one end is different. When the tension becomes higher than the end tension F2 (or F1), the stage member 3 or the take-up member 5 can rotate in a direction to eliminate the tension F difference. Thereby, it can suppress that the polarizing plate 33 tears resulting from the difference of this tension | tensile_strength F. FIG.
Therefore, it is possible to peel the polarizing plate 33 from the substrate 31 while suppressing the tearing of the polarizing plate 33.

  Further, in the peeling device 1 of the present embodiment, at least one of the stage member 3 and the winding member 5 is in a direction to eliminate the difference in tension F according to the difference in tension F between both ends of the boundary portion S. By rotating, the difference of the tension F is converted into at least one rotational force of the stage member 3 and the winding member 5.

According to such a configuration, when the balance of the tension F is lost between both ends of the boundary portion S, that is, when the tension F1 (or F2) at one end is higher than the tension F2 (or F1) at the other end, the stage The member 3 or the winding member 5 can be rotated in a direction to eliminate the difference in the tension F according to the difference in the tension F, and the difference in the tension F can be converted into a rotational force. Thereby, the difference can be eliminated.
Specifically, for example, when the tension F1 at one end becomes higher than the tension F2 at the other end as shown in FIG. A force for pushing the laminated body 30 toward the end (force directed upward in FIG. 4) is applied, and the one end is easily torn. However, by converting this force into the rotational force of the stage member 3 as shown in FIG. 5 (clockwise rotational force in FIG. 5), the force toward the other end at the one end can be reduced. Thereby, the difference in tension between the both ends can be eliminated. Also, for example, contrary to FIG. 4, when the tension F2 at the other end is higher than the tension F1 at the one end as shown in FIG. A force that pushes the laminated body 30 toward the small one end (force directed downward in FIG. 6) is applied, and the other end is easily torn. However, this force can be converted into the rotational force of the stage member 3 as shown in FIG. 7 (the counterclockwise rotational force of FIG. 7), and the force toward the one end at the other end can be reduced. Thereby, the difference in tension between the both ends can be eliminated.
Thus, since the difference in the tension F between the both ends is eliminated by the rotation of the stage member 3 accompanied with the laminate 30, it is more reliable that the polarizing plate 33 is torn due to the difference in tension. Can be prevented.
In the present embodiment, since the stage member 3 freely rotates, when a difference in tension F between both ends of the boundary portion S occurs, this difference in tension is immediately converted to the rotational force of the stage member 3. .

  Moreover, in the peeling apparatus 1 of this embodiment, the laminated body 30 is being fixed on the stage member 3, and it is comprised rotatably with the stage member 3 in the direction which eliminates the difference of the said tension | tensile_strength.

  According to this configuration, the stacked body 30 is fixed on the stage member 3 and can be rotated together with the stage member 3 in a direction to eliminate the difference in the tension F, whereby the stacked body 30 and the stage member 3 are Since the friction can be suppressed, the laminate 30 can rotate stably. Thereby, it can suppress more reliably that the polarizing plate 33 tears.

  Moreover, in the peeling apparatus 1 of this embodiment, the peeling member 5 peels the polarizing plate 33 further sequentially by winding and rotating one end portion 33b of the polarizing plate 33 peeled from the laminated body 30. It is the winding member 5 which winds up.

  According to this configuration, since the peeling member 5 is the winding member 5, the peeled polarizing plate 33 can be wound up sequentially, which is efficient. Further, for example, when the polarizing plate 33 is gripped and peeled, tension is applied to the once gripped portion until the peeling is completed. However, when the winding member 5 is used for peeling, the tension in the polarizing plate 33 is increased. Since these portions are sequentially changed by winding, when the peeling member 5 is the winding member 5, it is closer in the vicinity of the peeling member 5 than when the polarizing plate 33 is gripped and peeled off. It can suppress that the polarizing plate 33 is torn.

  Next, the peeling method using the peeling apparatus 1 of this embodiment is demonstrated.

The peeling method of this embodiment is
A placing step of placing a laminate 30 having a substrate 31 and a polarizing plate 33 bonded to the substrate 31 on the stage member 3;
A holding step of peeling one end of the polarizing plate 33 and holding the one end by the peeling member 5;
At least one of the laminate 30 and the peeling member 5 has a tension F between both ends of the boundary portion S between the polarizing plate 33 peeled from the laminate 30 and the polarizing plate 33 that has not been peeled off. A peeling step of further sequentially peeling the polarizing plate 33 by the peeling member 5 while rotating in a direction to eliminate the difference.

  Specifically, the winding member 5 is used as the peeling member 5.

  In the placing step, the stacked body 30 is fixed on the stage member 3.

In the holding step, one end of the polarizing plate 33 is peeled off and wound around the winding member 5 and held.
In the holding step, the one end portion 33b of the polarizing plate 33 is peeled from the laminate 30 as follows, for example. That is, a polarizing knife 33 is formed by grasping a peeling knife (not shown) having a blade at the tip with an operator's finger and inserting the peeling knife between the substrate 31 and the polarizing plate 33 of the laminate 30. Peel off some of the. More specifically, the peeling knife is inserted between the pressure-sensitive adhesive layer 35 and the substrate 31 in the laminate 30, and the polarizing plate 33 is peeled off together with the pressure-sensitive adhesive layer 35 (see FIGS. 1, 8, and 11). ).
Further, the one end portion 33b of the peeled polarizing plate 33 is wound around the winding member 5 as follows, for example. That is, it is performed by fixing the peeled one end portion 33 b of the polarizing plate 33 around the circumferential surface of the winding member 5 with an adhesive tape (not shown) or the like.

In the peeling step, the polarizing plate 33 is further peeled sequentially using the take-up member 5 while guiding the peeled polarizing plate 33 to the winding member 5 while curving the peeled polarizing plate 33 using the peeling auxiliary member 7. Then, the peeled polarizing plate 33 is wound up.
Further, at the time of winding, at least one of the laminate 30 and the winding member 5 is rotated in a direction to eliminate the difference in tension F according to the difference in tension F between both ends of the boundary portion S. The difference in the tension F is converted into at least one rotational force of the stage member 3 and the winding member 5.
More specifically, in the peeling step, the stage member 3 that can freely rotate on the virtual plane A (see FIG. 1) is moved to the virtual plane according to the difference in tension F between both ends of the boundary portion S. The polarizing plate 33 is wound up while rotating in a direction to eliminate the difference in tension F on A.
Further, the laminated body 30 is pressed toward the stage member 3 by the first support member 9 and sandwiched and supported by the stage member 3. Further, the substrate 31 exposed by peeling off the polarizing plate 33 is pressed toward the stage member 3 by the second support member 11, and is sandwiched and supported by the stage member 3.

  Further, here, the peeling assisting member 7 is disposed at an angle θ1 with respect to the absorption axis direction Y of the polarizing plate 33 in the laminated body 30 (see the broken line arrow in FIG. 2). The closer the peeling assisting member 7 is parallel to the absorption axis direction Y (angle θ1 = 0 °) and the closer it is perpendicular (angle θ1 = 90 °), the easier the polarizing plate 33 is torn during peeling. Therefore, considering this viewpoint, the angle θ1 is preferably 40 to 50 °. 2 shows an aspect in which the absorption axis direction Y of the polarizing plate 33 is parallel to the longitudinal direction of the laminate 30, and the peeling assisting member 7 is arranged at an angle θ1 = 45 °.

  Then, from the state shown in FIG. 8, when the winding member 5 sequentially takes up the polarizing plate 33 while further peeling off, as the polarizing plate 33 is further peeled off, as shown in FIGS. And the laminated body 30 moves sequentially with the support member 40 to the opposite side (refer to the white arrow) from the peeling direction X. That is, the stage member 3, the support member 40, and the stacked body 30 move relative to the winding member 5, the first support member 9, and the second support member 11 in the peeling direction X. At this time, as shown in FIGS. 4 to 7, the stage member 3 rotates so as to eliminate the difference in the tension F between both ends of the boundary portion S. As shown in FIG. 10, when all the polarizing plates 33 are finally peeled and the substrate 31 is completely exposed, the stage member 3, the supporting member 40, and the stacked body 30 stop moving.

According to the peeling method of the present embodiment, when the polarizing plate 33 is peeled from the substrate 31, when the balance of the tension F is lost between both ends of the boundary portion S, that is, the tension F1 (or F2) at one end is the other end. Direction in which at least one of the laminate 30 and the take-up member 5 as the peeling member 5 (here, the laminate 30) is eliminated in the tension F2 when the tension F2 (or F1) is higher Rotate to Thereby, it can suppress that the polarizing plate 33 tears resulting from the difference of this tension | tensile_strength F. FIG.
Therefore, it is possible to peel the polarizing plate 33 from the substrate 31 while suppressing the tearing of the polarizing plate 33.

  Further, in the peeling method of this embodiment, at least one of the laminate 30 and the peeling member 5 is rotated in a direction to eliminate the difference in tension F according to the difference in tension F between both ends of the boundary portion S. Thus, the difference in the tension F is converted into at least one rotational force of the stage member 3 and the winding member 5.

  According to such a configuration, when the balance of the tension F is lost between both ends of the boundary portion S, that is, when the tension F1 (or F2) at one end is higher than the tension F2 (or F1) at the other end, the stacking is performed. Either one of the body 30 and the peeling member 5 is rotated in a direction to eliminate the difference in the tension F in accordance with the difference in the tension F, thereby converting the difference in the tension F into a rotational force. it can. Thereby, the tension difference F can be eliminated.

More specifically, as described above, for example, when the tension F1 at one end is higher than the tension F2 at the other end as shown in FIG. The above-mentioned force that pushes the laminated body 30 to the other end with a small tension is applied and the one end is easily torn, but this force is converted into a rotational force of the stage member 3 as shown in FIG. The difference in tension between the two can be eliminated. Further, as described above, for example, contrary to FIG. 4, when the tension F2 at the other end is higher than the tension F1 at the one end as shown in FIG. The above-mentioned force that pushes the laminated body 30 from the other end to the one end having a small tension is applied to the other end and the one end is easily torn. This force is applied to the rotational force of the stage member 3 as shown in FIG. By converting, the difference in tension between the two ends can be eliminated.
Thus, since the difference in the tension F between the both ends is eliminated by the conversion to the rotational force, it is possible to more reliably prevent the polarizing plate from being broken due to the difference in the tension F. .
In this embodiment, since the stage member 3 freely rotates together with the laminated body 30, if a difference in tension F between both ends of the boundary portion S occurs, the tension difference is immediately converted into a rotational force.

In the peeling method of this embodiment,
In the above placing step, the laminated body 30 is fixed on the stage member 3,
In the peeling step, when the laminated body 30 and the peeling member 5 are rotated in a direction to eliminate the difference in the tension F, the laminated body 30 is rotated together with the stage member 3.

  According to this configuration, the laminate 30 is fixed on the stage member 3, and is rotated in a direction that eliminates the difference in the tension F together with the stage member 3, thereby causing friction between the laminate 30 and the stage member 3. Since it can suppress, the laminated body 30 can be rotated stably. Thereby, it can suppress more reliably that the polarizing plate 33 tears.

Moreover, in the peeling method of the said structure,
As the peeling member 5, a winding member 5 is used,
In the holding step, the one end portion 33b of the polarizing plate 33 is peeled off and wound around the winding member 5,
In the peeling step, the polarizing plate 33 is peeled from the laminate 30 by winding the polarizing plate 33 while further sequentially peeling the polarizing plate 33 by the winding member 5.

  According to this structure, since the polarizing plate 33 can be wound up by peeling the polarizing plate 33 by the winding member 5, it is efficient. Further, for example, when the polarizing plate 33 is gripped and peeled without being wound, tension is applied to the gripped portion until the peeling is completed, but when peeling using the winding member 5, Since the portion where the tension is applied in the polarizing plate 33 is sequentially changed by winding, by peeling while winding with the winding member 5, as compared with the aspect of grasping and peeling the polarizing plate 33, It can suppress that the polarizing plate 33 tears in the vicinity of the peeling member 5.

  As shown in FIG. 11, a laminate 30 to which the polarizing plate peeling apparatus 1 and the peeling method of the present embodiment are applied includes a substrate 31 and an adhesive layer 35 formed on one surface 31 a of the substrate 31. And a polarizing plate 33 laminated on the adhesive layer 35.

  Examples of the substrate 31 include a liquid crystal display panel and an organic EL display panel.

As shown in FIG. 12, in this embodiment, the polarizing plate 33 specifically includes a polarizer 41, an adhesive layer 43 formed on both surfaces of the polarizer 41, and these adhesive layers 43. And a protective film 45 laminated respectively.
As described above, in the present embodiment, the polarizing plate 33 has a protective film 45 laminated on both surfaces of the polarizer 41. In addition, in the present invention, the polarizing plate 33 is formed of the polarizer 41. An embodiment having a protective film 45 laminated on one surface can also be adopted.

  The thickness of the polarizing plate 33 is not particularly limited. However, for example, as the thickness of the polarizing plate 33 is smaller, the strength tends to be reduced and is likely to be torn. On the other hand, as the thickness is larger, the strength is increased and the strength is not easily broken. Therefore, for example, considering this viewpoint, the thickness of the polarizing plate 33 is 200 μm or less, preferably 90 μm or less, and more preferably 50 μm or less. Thus, when thickness is 200 micrometers or less, the peeling apparatus 1 and the peeling method of this embodiment can be applied preferably. Thus, even when the thickness is relatively small, the balance of the tension applied to the polarizing plate 30 is prevented from being lost, and the polarizing plate 33 can be hardly broken during peeling.

  The material of the polarizing plate 33 is not particularly limited. However, as will be described later, when the material of the polarizing plate 33, particularly the protective film 45, is easily broken, the peeling device 1 and the peeling method of this embodiment can be preferably applied.

Examples of the polarizer 41 include those formed by dyeing and stretching a polyvinyl alcohol film.
The thickness of the polarizer 41 is about 2 to 30 μm.

  Examples of the material for forming the adhesive layer 43 include conventionally known adhesives.

As the protective film 45, cellulose resin such as triacetyl cellulose, polyester resin, polyethersulfone resin, polysulfone resin, polycarbonate resin, polyamide resin, polyimide resin, polyolefin resin, (meth) acrylic resin, cyclic polyolefin resin (norbornene resin) , Polyarylate resin, polystyrene resin, polyvinyl alcohol resin, and a film formed from a mixture thereof.
Among these, since the protective film formed from the (meth) acrylic resin has relatively low strength and is easily broken, the peeling device 1 and the peeling method of the present embodiment can be preferably applied to the protective film.

The (meth) acryl means at least one of methacryl and acryl.
Such a (meth) acrylic resin has a Tg (glass transition temperature) of preferably 115 ° C. or higher, more preferably 120 ° C. or higher, still more preferably 125 ° C. or higher, and particularly preferably 130 ° C. or higher. When Tg is 115 ° C. or higher, the polarizing plate 33 can be excellent in durability. Although the upper limit of Tg of the (meth) acrylic resin is not particularly limited, it is preferably 170 ° C. or lower from the viewpoint of moldability and the like. From the (meth) acrylic resin, a film having in-plane retardation (Re) and thickness direction retardation (Rth) of almost zero can be obtained.

  Examples of the (meth) acrylic resin include poly (meth) acrylic acid esters such as polymethyl methacrylate, methyl methacrylate- (meth) acrylic acid copolymer, methyl methacrylate- (meth) acrylic acid ester copolymer, Methyl methacrylate-acrylic acid ester- (meth) acrylic acid copolymer, (meth) acrylic acid methyl-styrene copolymer (MS resin, etc.), polymer having an alicyclic hydrocarbon group (for example, methyl methacrylate) -Methacrylic acid cyclohexyl copolymer, methyl methacrylate-(meth) acrylate norbornyl copolymer, etc.). Preferably, poly (meth) acrylic acid C1-6 alkyl such as poly (meth) acrylate methyl is used. More preferred is a methyl methacrylate resin containing methyl methacrylate as a main component (50 to 100% by weight, preferably 70 to 100% by weight).

  Specific examples of (meth) acrylic resins include, for example, Acrypet VH and Acrypet VRL20A manufactured by Mitsubishi Rayon Co., Ltd., and (meth) acrylic resins and molecules having a ring structure in the molecule described in JP-A-2004-70296. Examples thereof include high Tg (meth) acrylic resins obtained by internal crosslinking or intramolecular cyclization reaction.

  A (meth) acrylic resin having a lactone ring structure can also be used as the (meth) acrylic resin. It is because it has high mechanical strength by high heat resistance, high transparency, and biaxial stretching.

  Examples of the (meth) acrylic resin having a lactone ring structure include JP 2000-230016, JP 2001-151814, JP 2002-120326, JP 2002-254544, and JP 2005-146084. And (meth) acrylic resins having a lactone ring structure, as described in Japanese Patent Laid-Open No. 1993-110.

The (meth) acrylic resin having a lactone ring structure preferably has a ring pseudo structure represented by the following general formula (Formula 1).

In the formula, R ¹ , R ² and R ³ each independently represent a hydrogen atom or an organic residue having 1 to 20 carbon atoms. The organic residue may contain an oxygen atom.

  The content of the lactone ring structure represented by the general formula (Formula 1) in the structure of the (meth) acrylic resin having a lactone ring structure is preferably 5 to 90% by weight, more preferably 10 to 70% by weight, The amount is preferably 10 to 60% by weight, particularly preferably 10 to 50% by weight. When the content of the lactone ring structure represented by the general formula (Chemical Formula 1) in the structure of the (meth) acrylic resin having a lactone ring structure is less than 5% by weight, heat resistance, solvent resistance, and surface hardness are poor. May be sufficient. If the content ratio of the lactone ring structure represented by the general formula (Chemical Formula 1) in the structure of the (meth) acrylic resin having a lactone ring structure is more than 90% by weight, molding processability may be poor.

  The (meth) acrylic resin having a lactone ring structure has a weight average molecular weight (sometimes referred to as a weight average molecular weight) of preferably 1,000 to 2,000,000, more preferably 5,000 to 1,000,000, still more preferably 10,000 to 500,000, particularly preferably. 50,000 to 500,000. If the weight average molecular weight is out of the above range, molding processability may be poor.

  The (meth) acrylic resin having a lactone ring structure preferably has a Tg of 115 ° C. or higher, more preferably 120 ° C. or higher, still more preferably 125 ° C. or higher, and particularly preferably 130 ° C. or higher. Since Tg is 115 ° C. or higher, the durability of the polarizing plate 33 containing it is excellent. Although the upper limit of Tg of the (meth) acrylic resin having the lactone ring structure is not particularly limited, it is preferably 170 ° C. or less from the viewpoint of moldability and the like.

  The (meth) acrylic resin having a lactone ring structure is preferably as the total light transmittance of a molded product obtained by injection molding measured by a method according to ASTM-D-1003 is higher, preferably 85%. Above, more preferably 88% or more, and still more preferably 90% or more. The total light transmittance is a measure of transparency, and if the total light transmittance is less than 85%, the transparency may decrease.

  The thickness of the protective film 45 as described above is usually about 20 to 60 μm.

In this embodiment, the adhesive force of the polarizing plate 33 with respect to the board | substrate 31 is 5-15N normally. With such an adhesive force, the polarizing plate 33 can be bonded relatively firmly to the substrate 31. Further, even when the polarizing plate 33 firmly bonded in this way is peeled, deformation (bending) of the peeling assisting member 7 described above is suppressed. Therefore, the peeling apparatus 1 and the peeling method of this embodiment are suitable for the laminate 30 having an adhesive force in the above range.
Such an adhesive force is a value measured by an autograph (precision universal testing machine, manufactured by Shimadzu Corporation).

  Next, a peeling apparatus and a peeling method according to the second embodiment of the present invention will be described.

First, the peeling apparatus 1 of this embodiment is demonstrated.
The peeling apparatus 1 of this embodiment is the same as that of 1st Embodiment except having the thing (refer FIGS. 13-16) of the structure different from the said 1st Embodiment as the peeling auxiliary member 7. FIG. For this reason, parts common to the first embodiment are denoted by common reference numerals and description thereof is not repeated.

  As shown in FIGS. 14 and 15, the peeling assisting member 7 provided in the peeling device 1 of the present embodiment has a long plate shape and has a bottom surface portion 7 a and a tip portion 7 b. In the present embodiment, the peeling assisting member 7 is inclined so as to be inclined from the front end portion 7b toward the rear end side (the downstream side in the peeling direction X, the right side in FIG. 14) and away from the bottom surface portion 7a. 7c.

The peeling assisting member 7 has a length (maximum length) L in the front-rear direction (peeling direction X) rather than a height (maximum height) H from the bottom surface (the surface of the bottom surface portion 7a). It is formed to be large.
The ratio of the length L to the length H (H: L) is preferably 1: 3 to 1: 5.
Further, the height H is preferably 15 to 20 mm, and the length L is preferably 50 to 75 mm.

  The bottom surface portion 7 a is arranged along the surface 33 a on the polarizing plate 33 side in the laminate 30. Specifically, the bottom surface portion 7a is disposed at a position where the polarizing plate 33 is peeled off using the peeling assisting member 7 so as to come into contact with the laminated body 30 and suppress the floating of the laminated body 30. Yes. The arrangement of the bottom surface portion 7a is not particularly limited as long as the bottom surface portion 7a comes into contact with the stacked body 30 and can prevent the stacked body 30 from being lifted at the time of peeling. For example, even if the bottom surface portion 7a is arranged in contact with the surface 33a on the polarizing plate 33 side before the start of separation using the separation assisting member 7, the bottom surface portion 7a is not in contact with the surface 33a in the vicinity of the surface 33a. May be arranged.

  The front end portion 7b is positioned on the upstream side (left side in FIG. 13) of the winding member 5 in the peeling direction X (the direction from the front end side to the rear end side of the peeling auxiliary member 7). With this arrangement, the peeled polarizing plate 33 is curved along the leading edge 7ba of the leading end portion 7b and guided to the rear end side (downstream in the peeling direction X) of the peeling assisting member 7. That is, the peeled polarizing plate 33 is guided toward the winding member 5.

The curvature radius of the tip edge 7ba of the tip portion 7b is not particularly limited and can be set as appropriate.
Here, as described above, since the adhesive force of the polarizing plate 33 to the substrate 31 is extremely high, the peeled polarizing plate 33 is unlikely to follow the front end portion 7b (the front end edge 7ba) in the vicinity of the boundary portion S. It has become. As shown in FIG. 15, the gap between the peeled polarizing plate 33 and the tip 7b tends to increase as the radius of curvature r of the tip 7b is relatively large. That is, the boundary portion S is easily located far from the contact portion M between the tip portion 7b and the stacked body 30 (upstream side, left side in FIG. 15).
On the other hand, as shown in FIG. 16, the gap between the peeled polarizing plate 33 and the tip 7b tends to be smaller as the radius of curvature r of the tip 7b is relatively small. That is, the boundary portion S is easily located near the contact portion M (downstream side, right side in FIG. 16) between the tip end portion 7b and the stacked body 30.
Then, as the gap between the peeled polarizing plate 33 and the tip portion 7b becomes larger, the peeling force of the polarizing plate 33 converted through the tip portion 7b becomes longer in the longitudinal direction (peeling direction X of the peeling assisting member 7). In a direction perpendicular to the vertical axis). Further, the substrate 31 is easily broken.
Further, according to common general technical knowledge, if the radius of curvature is too small, the tip 7b is too sharp and the polarizing plate 33 is likely to be cut.
Therefore, for example, in consideration of the above viewpoint, the radius of curvature of the tip edge 7ba of the tip portion 7b can be appropriately set, and the radius of curvature r is preferably 2.5 to 17.5 mm.
When the curvature radius r of the tip portion 7b is 17.5 mm or less, the boundary portion S of the polarizing plate 33 can be brought close to the contact portion between the stacked body 30 and the bottom surface portion 7a. As a result, the force that peels off the polarizing plate 33 transmitted through the tip portion 7b is less likely to vary in the extending direction of the tip portion 7b (the direction perpendicular to the peeling direction X). can do. In addition, cracking of the substrate 31 can be further suppressed.
Moreover, when the curvature radius r of the front-end | tip part 7b is 2.5 mm or more, it can suppress that the front-end | tip edge 7ba becomes too sharp, and can make the polarizing plate 33 hard to cut | disconnect.
Accordingly, the polarizing plate 33 can be more easily separated from the substrate 31.

The inclined part 7c guides the polarizing plate 33 guided by the front end part 7b further to the rear end side (downstream side in the peeling direction X) of the peeling auxiliary member 7.
Since the peeling assisting member 7 has the inclined portion 7c, the peeled polarizing plate 33 can be guided by the inclined portion 7c after being guided by the tip portion 7b. In other words, the path of the polarizing plate (peeled polarizing plate) 33 that has passed through the tip 7b can be maintained at a predetermined angle θ2 by the inclined portion 7c. Thereby, since the fluctuation | variation of the said angle (theta) 2 of the peeled polarizing plate 33 can be suppressed, the fluctuation | variation of the tension | tensile_strength concerning the front-end | tip part 7b resulting from this angle (theta) 2 can be suppressed.
Thus, since the balance of the tension applied to the peeling assisting member 7 is further suppressed, the polarizing plate 33 can be more easily peeled from the substrate 31.

The angle θ2 of the inclined portion 7c with respect to the plane T parallel to the laminate 30 is preferably 10 to 30 °.
Thus, when the angle θ2 of the inclined portion 7c is 10 to 30 °, the polarizing plate 33 is pressed against the laminated body 30 by the peeled polarizing plate 33, and the polarizing plate 33 is moved to the rear end side. It becomes possible to guide to.
Therefore, the polarizing plate 33 can be more easily peeled from the substrate 31 by making the peeling assisting member 7 more stable.

  As a forming material of such a peeling auxiliary member 7, for example, a stainless steel material, a carbon tool steel material, a high speed tool steel material, a chromium steel material, a chromium molybdenum steel material, a manganese steel material, other alloy materials, and the like, as in the first embodiment. A ceramic material is mentioned. Further, the peeling assisting member 7 may be hollow or solid.

  The tip edge 7ba of the tip 7b is preferably subjected to a mold release treatment so that the peeled polarizing plate 33 can easily slide on the surface. Examples of the mold release treatment include surface treatment such as saturated polyester coating and bicoat treatment on the tip portion 7ba, or attaching a conductive tape to the tip portion 7ba. It can be made slippery.

Next, the peeling method using the peeling apparatus 1 of this embodiment is demonstrated.
Since the peeling method of the present embodiment is the same as the peeling method of the first embodiment except that the peeling device 1 provided with the peeling assisting member 7 is used, aspects common to the first embodiment will be described. Do not repeat.

  In the peeling method of this embodiment, in the peeling process in the peeling method of the first embodiment, instead of the peeling auxiliary member 7 used in the first embodiment, the polarizing plate 33 is peeled off using a separate peeling auxiliary member 7. To do. Specifically, in the peeling step, the bottom surface portion 7a disposed along the surface 33a on the polarizing plate 33 side of the laminate 30 and the tip edge (surface) 7ba are formed in a curved shape, and the polarizing plate is peeled off. Using the plate-like peeling auxiliary member 7 having the tip portion 7b that curves the tip 33 along the tip edge 7ba, the peeling member 5 while curving the peeled polarizing plate 33 along the tip edge 7ba of the tip portion 7b. The polarizing plate 33 is peeled from the laminated body 30 by sequentially winding the polarizing plate 33 while further peeling the polarizing plate 33 using the winding member 5 while guiding to the winding member 5.

  The peeling assisting member 7 further includes an inclined portion 7a that is inclined from the front end portion 7b toward the rear end side and away from the bottom surface portion 7a, and is guided along the front end edge 7ba. The polarizing plate 33 is further guided to the winding member 5 along the inclined portion 7c.

According to the peeling apparatus 1 and the peeling method of the present embodiment, the polarizing plate 33 is peeled through the front end portion 7b and the bottom surface portion 7a by peeling the polarizing plate 33 from the substrate 31 using the peeling auxiliary member 7. At the same time, the peeled polarizing plate 33 can be guided along the front end edge 7ba of the front end portion 7b and guided to the rear end side. Thereby, it becomes possible to guide to the said rear end side, suppressing more reliably that the polarizing plate 33 is torn.
Further, since the peeling assisting member 7 is plate-shaped, the tension applied to the tip 7b when peeling is distributed to the remaining part (rear part), as shown in the first embodiment. Bending of the peeling assisting member 7 due to the tension is further suppressed than the roller-shaped peeling assisting member. Thereby, since the balance of the tension applied to the peeling assisting member 7 is prevented from being lost, problems such as tearing of the polarizing plate 33 due to the loss of the balance are suppressed.
Further, the peeling assisting member 7 is relatively excellent in durability because it is difficult to bend as described above.
In addition, since the peeling assisting member 7 is excellent in durability as described above, the curvature radius r of the tip portion is relatively small as compared with the roller-shaped peeling assisting member as shown in the first embodiment. Can be. Thereby, the balance of the tension applied to the peeling assisting member 7 is prevented from being lost, and the substrate 31 is prevented from cracking.
Therefore, it is possible to peel the polarizing plate 33 from the substrate 31 while more reliably suppressing the polarizing plate 33 from tearing.

Further, in the peeling apparatus 1 and the peeling method of the present embodiment, the peeling assisting member 7 has an inclined portion 7c that is inclined from the front end portion 7b toward the rear end side and away from the bottom surface portion 7a. Have more.
According to this configuration, since the peeling assisting member 7 has the inclined portion 7c, the peeled polarizing plate 33 is guided by the front end portion 7b and then further moved to the rear end side by the inclined portion 7c. It is possible to be guided. That is, the path of the peeled polarizing plate 33 that has passed through the distal end portion 7b can be maintained at a predetermined angle by the inclined portion 7c. Thereby, since the fluctuation | variation of the said angle of the peeled polarizing plate 33 can be suppressed, the fluctuation | variation of the tension | tensile_strength concerning the front-end | tip part 7b resulting from this fluctuation | variation can be suppressed.
Therefore, since the balance of the tension applied to the peeling assisting member 7 is further prevented from being broken, it is possible to more reliably suppress the polarizing plate 33 from being torn.

  Although the peeling apparatus 1 and the peeling method of this embodiment are as above-mentioned, this invention is not limited to the said embodiment, A design change can be suitably carried out within the range which this invention intends.

For example, in the above-described embodiment, the configuration in which the stage member 3 and the supporting member 40 are moved has been described. However, instead of moving these, the winding member 5, the peeling assisting member 7, and the first supporting member. 9 and the second support member 11 may be moved. Moreover, you may employ | adopt the structure which moves both the stage member 3 and the supporting member 40, the winding member 5, the peeling auxiliary member 7, the 1st supporting member 9, and the 2nd supporting member 11. FIG. A conventionally known moving mechanism can be adopted as means for moving these.
In addition, the stage member 3 is not configured to be rotatable because the support member 40 is not provided, and the stacked body 30 is slid on the stage member 3 without being fixed on the stage member 30. A configuration that is movable may be adopted. According to such a configuration, the laminate 30 can be rotated relative to the stage member 3 and the take-up member 5 in a direction in which the difference in tension F between both ends of the boundary portion S is eliminated.

  Moreover, in the said embodiment, although the laminated body 30 which has the board | substrate 31, the adhesive bond layer 35, and the polarizing plate 33 is peeled, the laminated body to which this invention is applied is the board | substrate 31, the adhesive bond layer 35, and polarization | polarized-light. You may employ | adopt the aspect which has another film further laminated | stacked on the polarizing plate 33 in addition to the board 33. FIG.

  Moreover, in the said embodiment, although the aspect which peels the polarizing plate 33 from the laminated body 30 using the peeling auxiliary member 7 was shown, in the present invention, as shown in FIG. 17, without using the peeling auxiliary member 7 You may employ | adopt the structure which peels the polarizing plate 33. FIG. Moreover, in this invention, when the aspect which peels the polarizing plate 33 from the laminated body 30 using the peeling auxiliary member 7 is employ | adopted, this peeling auxiliary member 7 is not specifically limited to the said embodiment, It designs suitably. It can be changed.

Moreover, in the said embodiment, although the structure that the stage member 3 is rotatable was employ | adopted, in this invention, you may employ | adopt the structure that the stage member 3 drives and rotates. As such a configuration, for example, the peeling device 1 measures a tension F between a drive member (not shown) such as a drive motor that drives and rotates the stage member 3 and both ends of the boundary portion S, and the measurement result is electronic data. As a measurement member (not shown) to be output as a signal, electronic data output from the measurement member is received, and a rotation direction and a rotation angle capable of eliminating the difference in tension F are calculated from the difference in tension F between both ends. And the structure provided with the control member which rotates the stage member 3 by the drive member (not shown) only by the rotation angle calculated toward the calculated rotation direction can be employ | adopted. In the peeling method using the peeling device 1, the stage member 3 is converted into the rotational force of the stage member 3 according to the difference in the tension F based on the measurement result of the measurement member. The polarizing plate 30 is peeled from the laminate 30 while being rotated.
According to such a peeling apparatus 1 and the peeling method, since the peeling direction can be adjusted more precisely according to the measurement result of the tension F, the difference in the tension F between both ends of the boundary portion S is more appropriate. Can be resolved. For example, when the stage member 3 is rotatable as described above, the stage member 3 does not rotate unless a tension F larger than the gravity generated by its own weight is applied to the stage member 3 at one end portion of the boundary portion S. Although there is a possibility, the stage member 3 can be rotated according to the tension | tensile_strength smaller than the said gravity by employ | adopting the structure rotated by the said control member.

  Moreover, in the said embodiment, although the laminated body 30 shows the aspect comprised rotatably, in this invention, even if it employ | adopts the structure where the winding member 5 can rotate, it takes up with the laminated body 30. A configuration in which both the member 5 and the member 5 are rotatable may be employed. As this structure, the structure by which the winding member 5 was supported by the supporting member (not shown) which can be rotated in the direction which eliminates the said tension | tensile_strength is mentioned, for example.

  Moreover, although the aspect which employ | adopted the winding member 5 as the peeling member 5 is shown in the said embodiment, in this invention, the peeling member 5 is not specifically limited to the said winding member. For example, as the peeling member 5, one having a configuration as shown in FIGS. 18 to 20 can be adopted instead of the winding member 5. The peeling member 5 is configured to further peel off the polarizing plate 33 by moving in the peeling direction X while holding the one end portion 33b of the peeled polarizing plate 33 while holding it. Specifically, as the peeling apparatus 1 including the peeling member 5, the peeling member 5 is movable while being supported in the peeling direction X of the polarizing plate 33, and the peeling is performed while being supported by the support portion 5a. And a driving member such as a servo motor or a linear motor that moves the support portion 5a in the peeling direction X. The holding portion 5b includes a holding portion 5b that can hold the one end portion 33b of the polarizing plate 33. In this state, one end 33b of the polarizing plate 33 is sandwiched and held, and in this state, the driving member moves the support portion 5b to separate the polarizing plate 33 (see FIG. 20).

  1: peeling device, 3: stage member, 5: peeling member, 5a: support portion, 5b: clamping portion, 7: peeling auxiliary member, 7a: bottom surface portion, 7b: tip portion, 7ba: tip edge, 9: first 11: second support member, 30: laminate, 31: substrate, 31a: one surface, 33: polarizing plate, 33a: surface on the polarizing plate side, 33b: one end, S: boundary portion

Claims (14)

A peeling device for peeling the polarizing plate from a laminate having a substrate and a polarizing plate bonded to the substrate,
A stage member on which the laminate is placed;
A peeling member that further sequentially peels off the polarizing plate while holding one end of the polarizing plate peeled off from the laminate.
At least one of the laminate and the peeling member rotates in a direction to eliminate the difference in tension between both ends of the boundary between the polarizing plate peeled from the laminated body and the polarizing plate that has not yet been peeled off. Peeling device configured to be possible.   At least one of the laminate and the peeling member rotates in a direction to eliminate the difference in tension according to the difference in tension between both ends of the boundary portion, and the difference in tension is rotated in the at least one of the layers. The peeling apparatus according to claim 1, wherein the peeling apparatus converts to force.   The said laminated body is comprised so that it can rotate in the direction which eliminates the said tension | tensile_strength on the virtual plane parallel to the said laminated body among the said laminated body and the said peeling member. The peeling apparatus described in 1. A plate-like peeling auxiliary member that guides the polarizing plate to the peeling member while the peeled polarizing plate is wound,
The peeling auxiliary member is
A bottom surface portion disposed along a surface of the laminate on the polarizing plate side;
The front end is formed into a curved surface, and has a front end that curves the peeled polarizing plate along the front end and guides it to the peeling member. The peeling apparatus described in 1.   The peeling apparatus according to claim 4, wherein the peeling assisting member further includes an inclined portion that is inclined from the front end portion toward the rear end side and away from the bottom surface portion.   The peeling apparatus according to any one of claims 1 to 5, wherein the laminated body is fixed on the stage member and is configured to be rotatable together with the stage member in a direction to eliminate the tension difference.   The said peeling member is a winding-up member which winds up, winding one end part of the said polarizing plate peeled off from the said laminated body while winding the said polarizing plate further sequentially by winding. The peeling apparatus in any one. On the stage member, a placing step of placing a laminate having a substrate and a polarizing plate bonded to the substrate;
A holding step of peeling one end of the polarizing plate and holding the one end by a peeling member;
At least one of the laminated body and the peeling member is rotated in a direction to eliminate a difference in tension between both ends of a boundary portion between the polarizing plate peeled from the laminated body and the polarizing plate not yet peeled. And a peeling step of peeling off the polarizing plate from the laminate by further peeling off the polarizing plate sequentially with the peeling member.   In the peeling step, at least one of the laminate and the peeling member is rotated in a direction to eliminate the tension difference in accordance with a tension difference between both ends of the boundary portion, and the difference in tension is determined. The peeling method according to claim 8, wherein the at least one rotational force is converted. In the peeling step,
The peeling according to claim 8 or 9, wherein, of the laminated body and the peeling member, the laminated body is rotated in a direction to eliminate the tension difference on a virtual plane parallel to the laminated body. Method. In the peeling step,
A plate having a bottom surface portion arranged along a surface on the polarizing plate side of the laminate, and a tip portion having a tip edge formed in a curved shape and curving the peeled polarizing plate along the tip edge. The peeling plate is further peeled sequentially by the peeling member while guiding the peeled polarizing plate to the peeling member while curving the peeled polarizing plate along the tip edge by using a strip-like peeling auxiliary member. The peeling method according to claim 8, wherein the polarizing plate is peeled from the laminate. The peeling assisting member further includes an inclined portion that is inclined from the front end portion toward the rear end side and away from the bottom surface portion,
The peeling method according to claim 11, wherein the polarizing plate guided along the leading edge is further guided to the peeling member along the inclined portion. In the placing step, the laminated body is fixed on the stage member,
The said peeling process WHEREIN: When rotating the said laminated body in the direction which eliminates the said tension difference among the said laminated body and the said peeling member, the said laminated body is rotated with the said stage member, It is characterized by the above-mentioned. Item 13. The peeling method according to any one of Items 8 to 12. As the peeling member, a winding member is used,
In the holding step, one end of the polarizing plate is peeled off and wound around the winding member,
In the said peeling process, the said polarizing plate is peeled from the said laminated body by winding up, further peeling the said polarizing plate further by the said winding member, The said polarizing plate is described in any one of Claims 8-13 characterized by the above-mentioned. Peeling method.

Images