JPH0648633A - Automatic separator for film - Google Patents

Abstract

PURPOSE:To automate a process for separating a film not by separating work of conventional system by human labor and to surely separate the film by preventing its separating mistake or the like, in the case of automatization. CONSTITUTION:An opposite surface to a surface pasted with a film 4 of sheet unit 1 is sucked to be held to a stage 13. A separating roller 22 is lowered down by the first roller moving drive means 31 and adhesively attached to a separation starting end part of the film 4 of the sheet unit 1. The separating roller 22 is rotated by a roller rotation drive means 26 and also moved parallelly to the sheet unit 1 by the second roller moving drive means 41. In this way, the film 4 is forced to be rewound while separated from the sheet unit 1 by the separating roller 22.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Conventionally, for example, in a polarizing plate as a sheet body for bonding with a liquid crystal display substrate, an adhesive layer coated with an adhesive is formed on one surface of the polarizing plate, and the surface of this adhesive layer is formed. A separate protective film is attached. And when attaching the polarizing plate to the liquid crystal display substrate,
The separate film is peeled off from the polarizing plate.

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 adhered is adsorbed and held by 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 separated 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 striped pattern is formed on the surface of the polarizing plate on which the adhesive is attached, which causes uneven display. Or dust is apt to adhere to the adhesive due to the presence of a person, and air bubbles are generated when the adhesive is attached to the liquid crystal display substrate, resulting in poor quality.

Therefore, the present invention intends to automate the peeling process of the film without relying on the conventional manual peeling work, and to prevent peeling error of the film during the automation so as to surely peel the film. It is an object of the present invention to provide an automatic film peeling device capable of performing the above.

[0006]

According to the invention of claim 1, there is provided an automatic film peeling device for peeling the film of a sheet body having an adhesive layer on one surface and having a film for protecting the adhesive layer attached thereto. A stage for adsorbing and holding the surface of the sheet body opposite to the surface to which the film is attached,
A peeling roller that adheres to the film and peels the sheet from the sheet while winding the film, a roller rotation driving unit that rotationally drives the peeling roller, and a moving roller that moves the peeling roller in a direction perpendicular to the stage. And a second roller movement driving means for moving the peeling roller in a direction parallel to the stage.

According to a second aspect of the present invention, in the first aspect of the present invention, the central axis of the peeling roller and the edge of the film of the sheet member adsorbed and held on the stage on the peeling start end side are not parallel to each other, and The roller movement driving means includes a screw shaft and a pulse motor that rotationally drives the screw shaft, and moves the peeling roller by screw feeding by rotation of the screw shaft.

According to a third aspect of the present invention, in the first or second aspect of the present invention, a detecting means for detecting the pressing force of the peeling roller against the sheet body, and a first drive based on the detection result of the detecting means. And a control means for controlling the means.

[0009]

According to the first aspect of the present invention, the surface of the sheet body opposite to the surface on which the film is adhered is adsorbed and held on the stage, and the peeling roller is caused to move by the first roller movement driving means to the peeling start end portion of the film of the sheet body. And the peeling roller is rotated by the roller rotation driving means and the peeling roller is moved in parallel with the sheet body by the second roller movement driving means.
The peeling roller winds the film while peeling it forcibly.
Therefore, the peeling process of the film is automated regardless of manual peeling work.

According to a second aspect of the present invention, in the first aspect of the present invention, the peeling roller is moved by screw feeding by rotation of the screw shaft so that the peeling roller is pressed against the peeling start end portion of the film at a constant position. Let By forming an angle between the central axis of the peeling roller and the peeling start end portion of the film, the peeling roller can be stably adhered to the corner portion of the film without affecting, for example, bending or warping of the peeling roller. These points enable reliable peeling of the film during automation. Also, by using a pulse motor to drive the peeling roller peeling movement, the peeling movement speed of the peeling roller gradually increases from the peeling start to the set speed, and the film peeling force due to the adhesive force of the peeling roller at the start of peeling Peeling is reliable, and peeling mistakes are prevented.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the detection unit detects the actual pressing force of the peeling roller against the sheet body, and the control unit detects the detection result of the detection unit. By controlling the first driving means, the pressing force of the peeling roller against the sheet body is always kept appropriate according to the type of sheet body and the type such as thickness.

[0012]

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

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

FIG. 1 is a perspective view of the automatic peeling apparatus, in which a base 11 is provided with a pedestal 12 standing upright at substantially the center of the base 11, and a stage 13 is mounted on the pedestal 12. This stage
The upper surface of the polarizing plate 13 is formed in a substantially flat rectangular shape on which the polarizing plate 1 is placed, and the polarizing plate 1 set with its back side facing downward is sucked and held by a suction means (not shown). Then, the stage 13 is set such that one short side edge portion of the separation film 4 of the polarizing plate 1 which is a peeling start end portion is inclined by an angle α with respect to a central axis of a peeling roller 22 described later. There is.

Reference numeral 21 denotes a roller unit, which has a peeling roller 22. The peeling roller 22 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 in the α-angle tilted state. One end of the shaft portion 23 of the peeling roller 22 is rotatably supported by a bracket 25, and is rotationally driven in the direction of the arrow in the figure by a torque motor 26 as a roller rotation driving means. A support shaft 27 projects from the bracket 25 in parallel with the peeling roller 22, and a pressing roller 28 in contact with the peeling roller 22 is rotatably attached to the tip of the support shaft 27.

Reference numeral 31 is a first roller movement driving means, and the first roller movement driving means 31 is supported by a slide member 33 having a bracket 25 attached to a support member 32 so as to be vertically slidable, and is not shown. The roller unit 21 is translated in the vertical direction with respect to the stage 13 by a drive source such as an air cylinder or a motor.

Reference numeral 41 denotes a second roller movement driving means, and 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, a guide rail 44 is attached to a side surface of the support plate 43, and a slide member 45 is slidably attached along the guide rail 44. Then, the slide member 45 is attached to the support member 32 of the roller unit 21.
Is attached, and as the slide member 45 moves, the peeling roller 22 and the like move in parallel while maintaining a parallel state with respect to the upper surface of the stage 13.

A screw shaft 46 is rotatably supported by mounting members 47 at both ends in parallel with the guide rail 44, and the screw shaft 46 is driven to rotate forward and backward by a pulse motor 48 mounted on one mounting member 47. The screw shaft 46 is a slide member.
It penetrates through the side of 45 and is screwed into a nut 49 attached to the slide member 45. As the screw shaft 46 rotates, the peeling roller 22
Etc. are driven to move.

Then, the pulse motor 48 is connected to the peeling roller 22.
The origin of the movement is adjusted, that is, the peeling roller 22 is located above the corner 4a of the peeling start end of the separate film 4 of the polarizing plate 1, and the operation origin is adjusted.

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

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.
Hold by adsorption. At this time, the roller unit 21 stands by at the origin position of the peeling roller 22, that is, the peeling roller 22 is positioned above the corner 4a of the peeling start end of the separate film 4 of the polarizing plate 1.

The roller unit 21 is lowered by the first roller movement driving means 31, and the peeling roller 22 is brought into pressure contact with 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 is
As shown in FIG. 3, when the rotation gradually increases with the passage of time and reaches the set speed, the set speed is maintained and the roller unit 21 moves leftward in FIG. 1 via the screw shaft 46. .

The peeling roller 22 rotates with the start of the movement of the roller driving unit 21, and the separating film 4 is peeled off by the adhesive force of the peeling roller 22, and the peeling roller 22 and the pressing roller 28.
The separation film 4 is sandwiched between
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 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 peeling roller 22 makes it possible to peel the separate film 4, and Since the separate film 4 is pressed against the peeling roller 22 by the pressing roller 28, the separate film 4 does not unwind due to rewinding while the peeling roller 22 is rotating.

Then, the peeling roller 22 winds up the entire separate film 4 to separate it from the polarizing plate 1, and further 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 to return the peeling roller 22 to the original 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 controlled arbitrarily and accurately by changing the number of pulses.

As described above, the peeling process of the separate film 4 can be automated without resorting to the conventional manual peeling work.

Further, during this automation, the separation film 4 can be reliably peeled off by the following points.
First, in the first point, by moving the peeling roller 22 by screw feeding by the rotation of the screw shaft 46, the peeling roller 22 can be pressed against the peeling start end portion of the separate film 4 at a constant position. . Then, in the second point,
By providing an angle α between the central axis of the peeling roller 22 and the peeling start end of the separation film 4, for example, the peeling roller 22 can be bent or warped without being affected.
22 can be stably adhered to the corner 4a of the separate film 4. Regarding this second point, the peeling roller
If the peeling roller 22 is bent or warped when the peeling start end portion of the separate film 4 is parallel to the peeling roller 22,
22 does not uniformly contact the peeling start end portion of the separate film 4, and a peeling 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 peeling start to the set speed, and the peeling roller at the peeling start time is increased. The peeling of the separate film 4 due to the adhesive force of 22 is sure and the peeling error 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 the timing pulleys 52 rotatably provided on the mounting members 47 at both ends, and one of the timing pulleys 52 is driven by a pulse motor 48 to rotate forward and backward. To do.

Also in this embodiment, by using the timing belt 51 and the pulse motor 48 which can accurately feed the peeling roller 22 like the screw shaft 46, the peeling of the separate film 4 can be surely performed. 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 peeling is started,
First, the peeling roller 22 is moved at a low speed, and the roller unit 21
When the detector 54 detects the detection plate 53 attached to the support member 32, the peeling roller 22 is moved at high speed.

The vertical direction of the automatic peeling apparatus of each of the above-described embodiments is reversed, the polarizing plate 1 is adsorbed and 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 remove the separate film 4. It may be peeled off.

Next, FIGS. 5 to 7 show still another embodiment of the present invention. In this embodiment, in particular, the peeling roller 22 is used.
The pressing force on the polarizing plate 1 is always kept appropriate, and the difference in the thickness of the polarizing plate 1 can be dealt with.

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

FIG. 6 is a partial view of the automatic peeling apparatus as seen from the end face direction. The second roller movement driving means 41 mounts a pair of guide rails 61 on the base 11 in parallel, A moving base 63 is attached via a sliding member 62 that is slidable along 61, and a nut member 64 that is screwed onto a screw shaft 46 for feeding drive is attached on the base 63.

In the first roller movement driving means 31, a supporting member 32 is erected on the moving base 63, the slide member 33 is attached to the supporting member 32 so as to be slidable in the vertical direction, and the moving base 63 is provided. The 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 are attached to the upper end of the, and an arm member 69 connected to the slide member 33 is fitted between the holding plates 68 so as to be vertically movable.

Further, between the upper holding plate 68 and the arm member 69, the rod 66 descends due to the operation of the air cylinder 65, and the pressing force when the peeling roller 22 is pressed against the polarizing plate 1 is detected. A pressure detector 70 as a detecting means is attached.

Further, one end of the wire 71 is connected to the arm member 69, and a plurality of pulleys 72 located above the arm member 69.
Is connected to the weight 73 via. The weight of the weight 73 is set to be substantially the same as the weight of the roller unit 21 attached to the slide member 33.

FIG. 5 shows a block diagram of an air circuit and a control circuit for controlling the air circuit. First, in the air circuit, an electropneumatic regulator 82 that adjusts the air pressure by electric control is connected to a high pressure supply source of the compressor via a filter regulator 81, and an air cylinder 65 is connected to the electropneumatic regulator 82 via a solenoid 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 the detected pressure by the pressure detector 70. The control device 85 is preliminarily set by inputting the optimum reference pressure value for each type of polarizing plate 1 obtained by a test or the like, and the pressure value input from the instrumentation conditioner 84 via the A / D converter 86 is set. It is compared with the reference pressure value, and the control signal corresponding to the difference is sent 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 descends and the peeling roller 22 comes into pressure contact with 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, and the electropneumatic regulator 82. The air pressure to the air cylinder 65 is adjusted by. Therefore, the pressing force of the peeling roller 22 on the polarizing plate 1 can be appropriately adjusted according to the kind of the polarizing plate 1 and the type such as the thickness, and the peeling operation of the separate film 4 can be ensured.

[0046]

According to the first aspect of the present invention, the surface of the sheet body opposite to the surface on which the film is adhered is adsorbed and held on the stage, and the peeling roller is used as the sheet body film by the first roller movement driving means. The peeling roller is driven to rotate by the roller rotation driving means and the peeling roller is moved in parallel with the sheet body by the second roller movement driving means, and the film is forcibly peeled by the peeling roller and wound. Can be taken. Therefore, the peeling process of the film can be automated regardless of the conventional manual peeling work.

According to the invention of claim 2, in the invention of claim 1, the peeling roller is moved at a constant position with respect to the peeling start end portion of the film by moving the peeling roller by screw feeding by rotation of the screw shaft. Press against. By forming an angle between the central axis of the peeling roller and the peeling start end portion of the film, the peeling roller can be stably adhered to the corner portion of the film without affecting, for example, bending or warping of the peeling roller. These points enable reliable peeling of the film during automation. Also, by using a pulse motor to drive the peeling roller peeling movement, the peeling movement speed of the peeling roller gradually increases from the peeling start to the set speed, and the film peeling force due to the adhesive force of the peeling roller at the start of peeling Peeling is reliable, and peeling mistakes can be prevented.

According to the invention of claim 3, in the invention of claim 1 or 2, the detection means detects the actual pressing force of the peeling roller against the sheet body, and the control means detects the detection result of the detection means. By controlling the first drive means based on the
The pressing force of the peeling roller on the sheet body can always be kept appropriate.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of an automatic film peeling apparatus of the present invention.

FIG. 2 is a cross-sectional view of a sheet body that is a film peeling target of the above-mentioned embodiment.

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

FIG. 4 is a perspective view of an automatic 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 automatic peeling apparatus according to the above embodiment.

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

[Explanation 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

Claims (3)

[Claims] 1. An automatic film peeling device for peeling the film of a sheet body having an adhesive layer on one surface and a film for protecting the adhesive layer, wherein the film of the sheet body is pasted. A stage for adsorbing and holding the surface opposite to the surface, a peeling roller for adhering to the film and peeling it from the sheet body while winding the film, roller rotation driving means for rotating the peeling roller, and the peeling roller. A first roller movement driving means for moving the peeling roller in a vertical direction with respect to the stage, and a second roller movement driving means for moving the peeling roller in a parallel direction with respect to the stage. Automatic film peeling device. 2. The center axis of the peeling roller and the edge portion of the sheet body of the sheet member adsorbed and held on the stage at the peeling start end side are made non-parallel, and the second roller movement driving means rotates the screw shaft and the screw shaft. The automatic film peeling device according to claim 1, further comprising a pulse motor for driving, wherein the peeling roller is moved by screw feeding by rotation of the screw shaft. 3. A detection means for detecting the pressing force of the peeling roller against the sheet body, and a control means for controlling the first drive means based on the detection result of this detection means. Item 1. The automatic film peeling device according to claim 1 or 2.