JP3311032B2 - Film peeling method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film peeling method for peeling a film of a sheet having an adhesive layer on one surface and a film for protecting the adhesive layer attached thereto.
And its devices.

[0002]

2. Description of the Related Art Conventionally, for example, in a polarizing plate as a sheet member to be bonded to a liquid crystal display substrate, an adhesive layer coated with an adhesive is formed on one surface of the polarizing plate. A separate film for protection is stuck. And when attaching the polarizing plate to the liquid crystal display substrate,
The separate film is peeled from the polarizing plate.

[0003] When the separate film is peeled from the polarizing plate, for example, the surface of the polarizing plate on which the separate film is not attached is suction-held on a stage, and an adhesive tape is manually attached to one end of the separate sheet. By pulling the adhesive tape, the separate film is peeled off from the polarizing plate together with the adhesive tape.

[0004]

However, when the separate film is manually peeled from the polarizing plate, the peeling speed is not constant, and a stripe pattern is formed on the surface of the polarizing plate to which the adhesive is attached, resulting in uneven display. Or dust easily adheres to the adhesive due to the presence of human beings, and bubbles are generated when bonded to the liquid crystal display substrate, resulting in poor quality.

[0005] Therefore, the present invention aims to automate off Irumu separation step, moreover, provides a film peeling method and device can be reliably peeled off and the film prevents erroneous peeling or the like of the film during the automated It shall be the object of the present invention to.

[0006]

SUMMARY OF THE INVENTION The present invention provides an adhesive layer on one side.
And a film that protects this adhesive layer is attached
Film peeling method for peeling a film of a laminated sheet body
And the surface of the sheet body to which the film is attached
Hold the opposite surface by suction and remove the peeling roller.
With a pressing force greater than the rotational torque for rotating
The peel roller is pressed against the sheet
And in parallel with this movement,
The film is peeled from the sheet by the peeling roller.
It winds up while separating .

[0007]

According to the present invention, the surface of the sheet body opposite to the surface to which the film is adhered is held by suction, and the peeling roller is moved by the peeling roller.
Pressing force greater than the rotational torque that drives the roller
The peel roller is pressed against the film of the sheet
It is moved in parallel with the body and
By rotating the roller, it is surely pressed even when automated
The film by the peeling roller being Ri taken winding while forcibly peeled from the sheet, be automated full Irumu separation step.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 2 is a cross-sectional view of a polarizing plate 1 as a sheet member. The polarizing plate 1 is a polarizing plate which is drawn by including a dye or iodine in polyvinyl alcohol (PVA), polyethylene terephthalate (PET) or the like. An adhesive layer 3 coated with an adhesive is formed on the surface of the polarizing plate body 2, and a separate film 4 for protecting the adhesive layer 3 can be peeled off from the surface of the adhesive layer 3. On the other hand, a protective film 5 for protecting scratches and deterioration is attached to the back surface of the polarizing plate body 2. And it is formed in a rectangular shape as shown in FIG.

FIG. 1 is a perspective view of a film peeling device,
Reference numeral 11 denotes a base, and a base 12 is erected substantially at the center of the base 11,
A stage 13 is provided on the pedestal 12. The stage 13 has an upper surface formed in a substantially flat rectangular shape on which the polarizing plate 1 is mounted, and is configured to suck and hold the polarizing plate 1 set with its rear side downward, by suction means (not shown). I have. The stage 13 is set such that one short side edge, which is the peeling start end of the separate film 4 of the polarizing plate 1, is inclined by an angle α with respect to a central axis of a peeling roller 22 described later. I have.

Reference numeral 21 denotes a roller unit having a peeling roller 22, which comprises a shaft portion 23 and a viscous roller portion 24 fitted around the shaft portion 23. Is formed so as to be wider than the polarizing plate 1 inclined by α degrees. One end of a shaft portion 23 of the peeling roller 22 is rotatably supported by a bracket 25, and is driven to rotate in a direction indicated by an arrow in the drawing by a torque motor 26 as a roller rotation driving unit. A support shaft 27 protrudes from the bracket 25 in parallel with the peeling roller 22, and a pressing roller 28 that is in contact with the peeling roller 22 is rotatably attached to the tip of the support shaft 27.

Reference numeral 31 denotes a first roller movement driving means. The first roller movement driving means 31 supports a slide member 33 having a bracket 25 attached to a support member 32 so as to be slidable up and down. The roller unit 21 is moved parallel to the stage 13 in the vertical direction by a driving source such as an air cylinder or a motor.

Reference numeral 41 denotes second roller movement driving means. The second roller movement driving means 41 is provided on the base 11 with leg members at both ends.
A support plate 43 is vertically installed at 42, and a guide rail 44 is mounted on a side surface of the support plate 43. A slide member 45 is slidably mounted along the guide rail 44. Then, the support member 32 of the roller unit 21 is attached to the slide member 45.
The peeling roller 22 and the like move in parallel with the upper surface of the stage 13 in parallel with the movement of the slide member 45.

A screw shaft 46 is rotatably supported by mounting members 47 at both ends in parallel with the guide rail 44. The screw shaft 46 is driven by a pulse motor 48 mounted on one of the mounting members 47 to rotate forward and reverse. And the screw shaft 46 is a slide member
45, and is screwed into a nut 49 attached to the slide member 45.
Are driven to move.

Then, the pulse motor 48
The operation origin is adjusted at the origin position of, that is, at a position above the corner 4a at the separation start end of the separation film 4 of the polarizing plate 1 with the separation roller 22.

On the base 11, on the side of the stage 13 opposite to the origin position of the peeling roller 22, a separate film 4 wound around the peeling roller 22, not shown, is provided.
There is provided a film removing means for removing the film from the peeling roller 22.

Next, the operation of this embodiment will be described.

First, the polarizing plate 1 is positioned and mounted on the stage 13 with the separate film 4 as the upper surface.
Is held by suction. At this time, the roller unit 21 is on standby, with the origin position of the peeling roller 22, that is, the peeling roller 22 is positioned above the corner 4 a at the peeling start end of the separate film 4 of the polarizing plate 1.

The roller unit 21 is lowered by the first roller moving drive means 31, and the peeling roller 22 is pressed against the corner 4a of the separate film 4 of the polarizing plate 1 with a predetermined pressing force.

Then, a rotation signal is sent to the torque motor 26. At this time, since the pressing force of the peeling roller 22 against the separate film 4 is larger than the rotation torque of the peeling roller 22,
The peeling roller 22 does not rotate.

Thereafter, a rotation signal is sent to the pulse motor 48 of the second roller movement driving means 41. The pulse motor 48
As shown in FIG. 3, when the rotation gradually increases with time and reaches a set speed, the set speed is maintained, and the roller unit 21 moves to the left in FIG. .

The peeling roller 22 rotates along with the movement start of the low Rayu knit 21, clamping the separate film 4 between the separation film 4 is peeled off, the peeling roller 22 and the pressing roller 28 by the adhesive force of the peeling roller 22 Then, the peeling roller 22 moves in parallel along the surface of the polarizing plate 1 while winding the separate film 4 around the peripheral surface of the peeling roller 22.

Since the adhesive force between the peeling roller 22 and the separate film 4 is stronger than the adhesive force between the separate film 4 and the adhesive layer 3, the separate roller 4 can be peeled off by the peeling roller 22. Since the separate film 4 is pressed against the peeling roller 22 by the pressing roller 28, the separate film 4 is not separated by rewinding while the peeling roller 22 is rotating.

Then, the peeling roller 22 winds up the whole of the separate film 4 and comes off the polarizing plate 1, moves to a position above the film removing means, and stops. After the separation film 4 wound around the peeling roller 22 is removed by the film removing means, the roller unit 21 is raised, and is fed in the direction opposite to the feeding direction during the peeling operation, and the peeling roller 22 is returned to the origin position.

Thereafter, a liquid crystal display substrate (not shown) is attached to the adhesive layer 3 of the polarizing plate 1.

The moving amount and speed of the peeling roller 22 during the peeling operation are determined by the number of pulses to the pulse motor 48, and can be arbitrarily and accurately controlled by changing the number of pulses.

As described above, the separate filter of the polarizing plate 1 is used.
The surface opposite to the surface on which
Roller 22 and a rotational torque for driving the peeling roller 22 to rotate.
Separate film of polarizing plate 1 with greater pressing force
4 and move the peeling roller 22 in parallel with the polarizing plate 1.
And the peeling roller 22 is rotated with this movement.
To ensure that the peeling roll can be reliably pressed even when automated.
The separate film 4 from the polarizing plate 1 by the roller 22
The film can be wound while being peeled off regularly, and the peeling step of the separate film 4 can be automated.

In this automation, the separation film 4 can be surely peeled off in the following points.
First, at the first point, by moving the peeling roller 22 by screw feed by the rotation of the screw shaft 46, the peeling roller 22 can always be pressed against the peeling start end of the separate film 4 at a fixed position. . Next, in the second point,
By providing an angle α between the center axis of the peeling roller 22 and the peeling start end of the separate film 4, the peeling roller 22 is not affected, for example, without bending or warping of the peeling roller 22.
22 can be stably adhered to the corners 4a of the separate film 4. Regarding this second point, the peeling roller
When the peeling roller 22 is bent or warped when the peeling start end of the separate film 4 is parallel to the peeling start end of the separate film 4, the peeling roller 22
22 does not uniformly contact the separation start end of the separate film 4 over the entire surface, and a separation error occurs.

Further, by using the pulse motor 48 for driving the horizontal movement of the peeling roller 22, the horizontal moving speed of the peeling roller 22 gradually increases from the start of peeling to the set speed. The peeling of the separate film 4 by the adhesive force of 22 is ensured, and a peeling mistake can be prevented.

Next, FIG. 4 shows another embodiment of the present invention.
This embodiment is particularly characterized by the second roller movement driving means 41. That is, in parallel with the guide rail 44, an endless timing belt 51 is stretched between timing pulleys 52 rotatably provided on the mounting members 47 at both ends, and one of the timing pulleys 52 is driven forward and reverse by a pulse motor 48. I do.

Also in this embodiment, the separation film 4 can be surely separated by using the timing belt 51 and the pulse motor 48 which can accurately feed the separation roller 22 similarly to the screw shaft 46. Also in this embodiment, it is desirable to set the angle α between the central axis of the peeling roller 22 and the peeling start end of the separate film 4.

When a motor capable of switching between low speed and high speed is used instead of the pulse motor 48, when the peeling starts,
First, the peeling roller 22 is moved at a low speed, and the roller unit 21 is moved.
When the detector 54 detects the detection plate 53 attached to the support member 32, the peeling roller 22 is moved at a high speed.

The vertical direction of the film peeling device in each of the above embodiments is reversed, the polarizing plate 1 is suction-held on the lower surface of the stage 13, and the peeling roller 22 is moved on the lower surface side of the stage 13 to move the separate film 4. You may make it exfoliate.

FIGS. 5 to 7 show still another embodiment of the present invention.
The pressing force on the polarizing plate 1 is always kept at an appropriate level so that the thickness difference of the polarizing plate 1 can be coped with.

In this embodiment, the constructions of the first and second roller movement driving means 31, 41 and the like are slightly different from those of the above-mentioned embodiments. First, these constructions will be described.

FIG. 6 is a partial view of the film peeling apparatus viewed from the end face direction.
A pair of guide rails 61 is mounted on the upper side in parallel, a moving base 63 is mounted via a sliding member 62 which can slide along each guide rail 61, and a screw shaft 46 for feed driving is mounted on the base 63. A nut member 64 is screwed into the nut.

The first roller movement driving means 31 has a support member 32 erected on a movement base 63, and a slide member 33 is attached to the support member 32 so as to be slidable in the vertical direction. An air cylinder 65 is erected on the upper side, and as shown in FIG.
A pair of upper and lower holding plates 68 connected by bolts 67 is attached to the upper end of the arm member 69, and an arm member 69 connected to the slide member 33 is fitted between the holding plates 68 so as to be freely movable in the vertical direction.

The rod 66 is lowered between the upper holding plate 68 and the arm member 69 by the operation of the air cylinder 65 to detect the pressing force when the peeling roller 22 is pressed against the polarizing plate 1. A pressure detector 70 as detection means is attached.

Further, one end of a wire 71 is connected to the arm member 69, and a plurality of pulleys 72 located above the arm member 69 are connected.
And is connected to the weight 73 through the. The weight of the weight 73 is set substantially equal to the weight of the roller unit 21 attached to the slide member 33.

FIG. 5 is a block diagram showing an air circuit and a control circuit for controlling the air circuit. First, in the air circuit, an electropneumatic regulator 82 for adjusting air pressure by electric control is connected to a high-pressure supply source of the compressor via a filter regulator 81, and the air cylinder 65 is connected to the electropneumatic regulator 82 via an electromagnetic valve 83. Are connected. On the other hand, the control circuit is connected to a control device 85 as control means via an instrumentation conditioner 84 that reads a pressure detected by the pressure detector 70. In the control device 85, an optimal reference pressure value for various polarizers 1 previously obtained by a test or the like is input and set, and the pressure value input from the instrumentation conditioner 84 via the A / D converter 86 is set. The control signal corresponding to the difference is compared with the reference pressure value via the D / A converter 87 to the electropneumatic regulator 82.
Output to

At the start of the peeling operation, the air cylinder 65
As a result, the roller unit 21 is lowered, and the peeling roller 22 is pressed against the separate film 4 of the polarizing plate 1 on the stage 13. At this time, the pressing force is detected by the pressure detector 70, the control device 85 compares the detected pressure value with the reference pressure value, outputs a signal corresponding to the corrected pressure value to the electropneumatic regulator 82, To adjust the air pressure to the air cylinder 65. Therefore, the pressing force of the peeling roller 22 against the polarizing plate 1 can be appropriately adjusted according to the type, thickness, and the like of the polarizing plate 1, and the separating operation of the separate film 4 can be ensured.

[0042]

According to the present invention, the surface of the sheet body opposite to the surface to which the film is adhered is held by suction, and the peeling roller is
It is larger than the rotational torque that drives this peeling roller to rotate.
Pressing against the film of the sheet by pressing force
Move the roller parallel to the sheet and
By rotating the peeling roller,
The film is sheeted by the peeling roller which is securely pressed
Can be wound forcibly peeled while from the body, wear full I le <br/> beam separation step in an automated.

[Brief description of the drawings]

1 is a perspective view showing an embodiment of a fill arm exfoliation apparatus of the present invention.

FIG. 2 is a cross-sectional view of a sheet body to be peeled off in the embodiment.

FIG. 3 is a characteristic diagram showing a starting characteristic of the pulse motor of the embodiment.

FIG. 4 is a perspective view of a film peeling device showing another embodiment of the present invention.

FIG. 5 is a circuit block diagram showing still another embodiment of the present invention.

FIG. 6 is a side view of the film peeling device of the embodiment.

FIG. 7 is a partial cross-sectional view of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Polarizing plate as a sheet body 3 Adhesive layer 4 Film 13 Stage 22 Peeling roller 26 Torque motor as roller rotation driving means 31 First roller movement driving means 41 Second roller movement driving means 46 Screw shaft 48 Pulse motor 70 Detection Pressure detector as means 85 Control equipment as control means

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65H 29/54 G02F 1/13

Claims (5)

(57) [Claims] 1. An adhesive layer having an adhesive layer on one side
A sheet film with a film protecting the layer
A film peeling method for peeling off the surface of the sheet body opposite to the surface to which the film is attached.
The rotating roller that rotates and drives the peeling roller
With a greater pressing force than
Pressure, along with moving the peeling roller in parallel with the sheet
The peel roller is rotated with this movement, and
Special feature is to take up the film while peeling it off the sheet.
Characteristic film peeling method. 2. The peeling roller is an adhesive for peeling the film.
2. The film peeling method according to claim 1, wherein
Release method. 3. A fill-time exfoliation device film for protecting the adhesive layer is peeled off the film adhered to the sheet with an adhesive layer on one surface, the film of the sheet body is stuck A stage that adsorbs and holds a surface opposite to the peeled surface; a peeling roller that adheres to the film and peels off the sheet while winding the film; a roller rotation driving unit that rotationally drives the peeling roller; a first roller moving drive means for moving in a vertical direction with respect to the stage, said a second roller movement driving means for moving parallel to the direction parallel to the peeling roller relative to the stage, the first Roller movement driving means, the peeling roller,
Rotational torque of the peeling roller by the roller rotation driving means
Phil beam exfoliation and wherein the pressing on the sheet at higher pressing force than. 4. A center axis of a peeling roller and an edge on a peeling start end side of a film of a sheet to be sucked and held on a stage are non-parallel, and a second roller moving driving means rotates the screw shaft and the screw shaft. comprising a pulse motor for driving, fill beam exfoliation apparatus according to claim 3, wherein the moving the peeling roller by screws feeding by rotation of the screw shaft. 5. A detecting device for detecting a pressing force of a peeling roller against a sheet member, and a control device for controlling a first driving device based on a detection result of the detecting device. 3. or <br/> other Phil beam exfoliation apparatus according 4.