JPH1087160A - Peeling mechanism for protective sheet on polarizing plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a polarizing plate from separating from an adsorption plate and an adhesive tape from breaking both due to an impulsive increase in tension of the adhesive tape in peeling a protective sheet off the polarizing plate at a higher rate. SOLUTION: A feed roller 9 partly corrugated at its periphery is arranged between a peeling roller for peeling a protective sheet off a polarizing plate and a recovery roller for receiving an adhesive tape 2. An air blowoff block 14 having several air blowoff holes 15 is opposed to the feed roller 9. Immediately after the protective sheet is peeled off the polarizing plate, the feed roller 9 is rotated in the arrowed direction by a speed control motor to thereby feed the adhesive tape 2 while deforming it by pressing it into the corrugated recesses on its periphery with air.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for removing a protective sheet attached to a polarizing plate.

[0002]

2. Description of the Related Art As shown in FIG. 3, a front surface protection sheet 3a and a rear surface protection sheet 3 are provided on both sides of a polarizing plate 1, respectively.
b is affixed.

The configuration and operation of a conventional polarizing plate protective sheet peeling mechanism will be described with reference to FIG.

The conventional polarizing plate protective sheet peeling mechanism includes an adsorption plate 24 for fixing the polarizing plate 1, a peeling roller 25 around which an adhesive tape 22 is wound, an actuator 26 for pressing the peeling roller 25 against the polarizing plate 1, Roller 25
And a slider 27 having an actuator 26 attached to a moving stage, a supply reel 28 for fixing the adhesive tape 22, a guide roller 29 for preventing interference between the adhesive tape 22 and the slider 27, and a peeled back protective sheet 3b. A collecting reel 30 for winding the adhesive tape 22, a torque motor 31 for rotating the collecting reel 30 in the winding direction, and a collecting reel 30 connected to the torque motor 31;
Is constituted by a one-way clutch 32 which can rotate only in the winding direction.

[0005] The surface protective sheet side of the polarizing plate 1 is attracted and fixed to the attracting plate 24. The peeling roller 25 is moved by the slider 27 to the peeling start position of the polarizing plate 1 and pressed against the polarizing plate 1 by the actuator 26. In this state, the torque of the torque motor 31 is increased,
, And the slider 27 is retracted.
The back surface protection sheet 3b adheres to the adhesive tape 22 and is separated from the polarizing plate 1. At the same time, the peeled back protective sheet 3b and the used adhesive tape 22 are wound around the collecting reel 30. The pressed release roller 25 is lowered when the uniaxial stage 27 reaches the origin position, the torque motor 31 is reduced in torque so that the adhesive tape 22 does not slack, and the polarizing plate protective sheet peeling mechanism is returned to the initial state. .

[0006]

In the conventional polarizing plate protective sheet peeling mechanism, when the peeling roller 25 is moved backward at a high speed,
The rise of the torque motor 31 that performs the winding operation is slow, and the adhesive tape 22 and the peeling roller 25 are separated from each other as shown in FIG. At this time, the tension of the adhesive tape 22 decreases. Next, after the high-speed retreat of the peeling roller 25 reaches the constant speed region, the adhesive tape 22 catches up with the peeling roller 25,
The adhesive tape 22 is wound around the peeling roller 25. At this time, the tension of the adhesive tape 22 is increased in an impact. Due to the shock, the polarizing plate 1 may be detached from the suction plate 24 in some cases. In addition, the adhesive tape 22 may be cut due to the impulsive increase in tension.

[0007] Therefore, the present invention is to improve the disadvantages of the above-mentioned prior art, when peeling the protective sheet from the polarizing plate at high speed,
The purpose of the present invention is to prevent the separation of the polarizing plate from the suction plate and the cutting of the adhesive tape due to the increase in the impact tension generated in the adhesive tape.

[0008]

The present invention employs the following means to solve the above-mentioned problems.

(1) A plate for adsorbing a polarizing plate to which a protective sheet is stuck, an adhesive tape sent out from a supply reel and wound on a recovery reel, a peeling roller around which the adhesive roller is wound, and a peeling roller An actuator that presses against the protection sheet attached to the polarizing plate, a slider to which the peeling roller and the actuator are attached, and an interposition between the peeling roller and the collection reel, where interference between the adhesive roller and the slider occurs. And a speed control motor for controlling the rotation of the feed roller, air blowing means for pressing the adhesive tape against the feed roller, and a motor for rotating the collection reel Polarizing plate protective sheet peeling mechanism.

(2) The polarizing plate protective sheet peeling mechanism according to (1), wherein the peripheral surface of the feed roller has a wavy shape.

(3) The polarizing plate protective sheet peeling mechanism according to the above (1), wherein the air blowing means is a block having several air blowing holes.

(4) The polarizing plate protective sheet peeling mechanism according to (1), wherein a one-way clutch is interposed between the recovery reel and the motor.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration and operation of an embodiment of the present invention will be described with reference to FIGS.

The polarizing plate protective sheet peeling mechanism according to one embodiment of the present invention includes a suction plate 4 for fixing the polarizing plate 1,
A peeling roller 5 around which the adhesive tape 2 is wound, an actuator 6 for pressing the peeling roller 5 against the polarizing plate 1, a slider 7 on which the peeling roller 5 and the actuator 6 are mounted on a moving stage, and a supply reel for fixing the adhesive tape 2 8, a feed roller 9 for preventing the interference between the adhesive tape 2 and the slider 7 and for winding the adhesive tape 2 and having a wavy peripheral surface, and a collecting reel 10 for winding the peeled back protective sheet 3b and the used adhesive tape 2 A torque motor 11 for rotating the collection reel 10 in a winding direction;
, A one-way clutch 12 for rotating the collection reel 10 only in the winding direction, a speed control motor 13 for winding the adhesive tape 2, and the adhesive tape 2 to the corrugated feed roller 9 by high-pressure air. And an air blowing block 14 which can be pressed.

Next, the operation will be described. The surface protection sheet 3a side of the polarizing plate 1 is sucked and fixed to the suction plate 4. The peeling roller 5 is moved by the slider 7 to the peeling start position of the polarizing plate 1 and pressed against the polarizing plate 1 by the actuator 6. In this state, the torque of the torque motor 11 is increased to give a peelable tension to the adhesive tape 2, and the slider 7 is retracted. At this time, the speed control motor 13 is operated to rotate the wave-shaped feed roller 9.

Here, when high-pressure air is constantly blown out from several air blowing holes 15 opened in the air blowing block 14, the adhesive tape 2 is pressed against the feed roller 9 having a wavy peripheral surface. It is wound up to stick (see FIG. 2). At this time, even if the rise of the torque motor 11 is delayed, the adhesive tape 2 can be wound regardless of the tension from the torque motor 11. Therefore, the adhesive tape 2 follows the peeling roller 5 and is always wound. As a result, no impact tension is generated, and the back surface protection sheet 3b is stably separated from the polarizing plate 1 at high speed. At the same time, the peeled back protective sheet 3
b and the used adhesive tape 2 are wound around a collection reel 10. The pressed peel roller 5 is lowered when the slider 7 reaches the origin position, the torque of the torque motor 11 is reduced to such a degree that the adhesive tape 2 does not slack, and the polarizing plate protective sheet peeling mechanism is returned to the initial state.

Further, as shown in FIG.
The non-adhesive surface of the feed roller 9 is pressed against the corrugated peripheral surface of the feed roller 9 by the high-pressure air blown from the air blowing block 14 and is wound up. Since it is in contact, there is no adhesion of the adhesive and the maintainability is good.

[0018]

As is clear from the above description, according to the present invention, the pressure-sensitive adhesive tape is provided with a wave-shaped feed roller whose rotation is controlled by a speed control motor and air blowing means capable of blowing air. It is wound up reliably and is not affected by the delay in the rise of the torque motor. Therefore, the pressure-sensitive adhesive tape always maintains a substantially constant tension and is wrapped around the peeling roller. Therefore, when the protective sheet is peeled from the polarizing plate, the pressure-sensitive adhesive tape does not have an impulsive increase in tension. Can play.

(1) The protective sheet can be peeled off from the polarizing plate at a high speed.

(2) There is no problem that the polarizing plate is separated from the suction plate.

(3) There is no problem that the adhesive tape is cut.

(4) Since the feed roller is not in contact with the adhesive surface of the adhesive tape, there is no adhesion of the adhesive and the maintainability is good.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is a front view of a main part of one embodiment of the present invention.

FIG. 3 is a perspective view of a polarizing plate having protective sheets attached to both front and back surfaces.

FIG. 4 is a perspective view of a conventional polarizing plate protective sheet peeling mechanism.

FIG. 5 is a front view of a part of a conventional polarizing plate protective sheet peeling mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Polarizing plate 2 Adhesive tape 3a Surface protection sheet 3b Back surface protection sheet 4 Suction plate 5 Peeling roller 6 Actuator 7 Slider 8 Supply reel 9 Feed roller 10 Collection reel 11 Torque motor 12 One-way clutch 13 Speed control motor 14 Air blowing block 15 Air blowing Hole

Claims (4)

[Claims] 1. A plate for adsorbing a polarizing plate to which a protective sheet is attached, an adhesive tape sent out from a supply reel and taken up on a recovery reel, a peeling roller around which the adhesive roller is wound, and the peeling roller. An actuator that presses against the protective sheet attached to a polarizing plate, a slider to which the peeling roller and the actuator are attached, and a slider that is disposed between the peeling roller and the collection reel to prevent interference between the adhesive roller and the slider. And a feed roller having an uneven peripheral surface, a speed control motor for controlling the rotation of the feed roller, air blowing means for pressing the adhesive tape against the feed roller, and a motor for rotating the collection reel. A polarizing plate protective sheet peeling mechanism, comprising: 2. The polarizing plate protective sheet peeling mechanism according to claim 1, wherein the peripheral surface of the feed roller has a wavy shape. 3. The polarizing plate protective sheet peeling mechanism according to claim 1, wherein said air blowing means is a block having several air blowing holes. 4. A one-way clutch is interposed between said recovery reel and said motor.
The polarizing plate protective sheet peeling mechanism as described in the above.