JPH09314677A - Positioning apparatus for bonding film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid to cause a flaw on the inner face (the back face) of a functional film and to decrease defect of a cathod ray tube caused by sticking of dust by positioning a film placed on a plurality of rollers after carrying it by synchronously rotating the plurality of rollers. SOLUTION: An apparatus 18 for positioning for bonding a film takes out a film being cut into at most the same area to that of the face to be bonded and places it on the apparatus 18 for positioning for bonding the film and positions the film 1 at a position where the film has benn carried and bonds the film 1 on a face panel 11. This apparatus 18 for positioning for bonding the film is constituted of a plurality of rollers 19 which are freely rotatably arranged in parallel in the carrying direction and whose surfaces are mirror- finished and the lengths of which are longer than the width of the film and the film 1 placed on the rollers 19 is positioned after it is carried by rotating synchronously the plurality of rollers 19. Positioning of the functional film is performed thereby at a correct position and there exists no possibility of generating a flaw on the inner face of the functional film 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film sticking positioning device suitable for sticking a film to a sticking surface.

[0002]

2. Description of the Related Art A functional film or the like is attached to a cathode ray tube (hereinafter referred to as CRT) or other surface to be attached via an adhesive such as an ultraviolet curable resin. This functional film is, for example,
In a display device such as a CRT, a function to prevent reflection of illumination light,
It has antistatic function, leakage electric field blocking function, antifouling function, etc.

Such a functional film 1 has primer layers 3a and 3b formed on both sides of a base film 2 made of polyethylene terephthalate (hereinafter referred to as PET) as shown in FIG. 4, and one of the primer layers 3a is made of CRT4. It is formed so as to be attached to the face plate surface via the ultraviolet curing adhesive 5. A hard coat layer having a low refractive index and a high refractive index is laminated on the other primer layer 3b. Of course,
In order to obtain an antistatic effect, a conductive layer and the like are also laminated so that the total film thickness is about 200 μm. Reference numerals 6 and 7 in FIG. 4 show a schematic configuration in which the high-refractive-index film 6 and the low-refractive-index film 7 laminated on the primer layer 3b have a two-layered structure.

FIG. 4 schematically shows a structure for canceling reflection of reflected light such as illumination. When the incident light 8 is reflected by the surfaces of the low-refractive film 7 and the high-refractive film 6, the reflected lights 9 interfere with each other to cancel each other, and the observed reflected light 10 is attenuated so that the optical path difference and the film thickness are reduced. To be selected.

Conventionally, such a functional film 1 is used as a CRT 4
5A, a fluorescent screen is formed on the inner surface of the face panel 11 and a color selection means such as an aperture grill is attached to the inner surface of the face panel 11 as shown in FIG. 5A. Funnel glass 12
Are joined together, and an explosion-proof band or the like is arranged so as to surround the seal line to complete the CRT 4. After that, the surface of the face panel 11 of the CRT 4 is washed, then sequentially washed with pure water and an alcohol solvent, and then dried.

Next, as shown in FIG. 5B, an ultraviolet curing adhesive 5 is applied to the surface of the face panel 11. As the UV-curable adhesive 5, a cured product of which the refractive index is adjusted to be within 0.8% of the refractive index of the panel is used. For example, as the ultraviolet curable adhesive 5, bisphenol A type epoxy (meth) acrylate having a molecular weight of 550 or more: 10% by weight, urethane (meth) acrylate: 20% by weight, and hydroxyl group-containing mono (meth) acrylate: 70% by weight. Consists of these UV curable adhesives 5
Used with 3% of a photopolymerization initiator and several% of additives.
The application of the ultraviolet curable adhesive 5 can be carried out by a known method, for example, a roll coating method, in which air bubbles contained therein are defoamed before application.

Next, as shown in FIGS. 5C and 5D, the functional film 1 cut into a shape corresponding to the front shape of the face panel 11 is applied to the application surface of the ultraviolet curable adhesive 5. At that time, as will be described later with reference to FIG. 1, the sticking work is automated by using the pressing roller 13. After that, ultraviolet rays are irradiated from above the functional film 1 using an irradiation light source to cure the ultraviolet curing adhesive 5 shown in FIG. A metal halide lamp, a high-pressure mercury lamp, a xenon lamp or the like can be used as the irradiation light source, and the irradiation energy is preferably about 300 to 500 mJ / cm ² .

[0008]

In the step of sticking the above-mentioned conventional functional film 1 to the face panel 11 of the CRT 4, the face panel 1 to be stuck is previously attached.
The functional film 1 cut into a predetermined size so as to have an area slightly smaller than 1 is picked up from a cassette or the like, and one picked-up functional film 1 is placed on the film positioning device. The functional film 1 is conveyed to the CRT position where it should be attached, and the functional film 1 regulated at the correct position is pulled out to perform CR.
It is designed to be attached to the face panel 11 surface of T4.

The film transfer rollers arranged in parallel for use in such a film sticking positioning device are made of synthetic resin and are composed of a pair of transfer rollers 14a and 14b separated as shown in FIG. Transport roller 1
The transmission members 15a and 15b made of an elastic material such as a rubber belt are used as 4a and 14b. Further, means for temporarily adhering the gripping tape 16 is provided in the positioning device.

The above-mentioned gripping tape 16 is used by the gripping means when the functional film 1 is brought onto the face plate 11 of the CRT 4, and the functional film 1 is adhered onto the face plate 11 of the CRT 4. It is temporarily adhered to the functional film 1 so that it can be easily peeled off later.

Further, the primer layer 3a provided on the lower surface of the PET 2 of the functional film 1 is extremely soft with a hardness of F of a pencil, and is placed on the carrying rollers 14a and 14b as shown in FIG. Frequent occurrence of linear scratches 17 on the lower surface as shown by the broken line, and C
When the functional film 1 is adhered to the face panel 11 of the RT4, there is a problem that the screen is glared when the CRT 4 is operated, and a shadow of dust appears.

SUMMARY OF THE INVENTION The present invention is intended to provide a film sticking and positioning device which solves the above problems. The problem is that the inner surface (back surface) of the functional film is not scratched and dust is attached. It is intended to provide a functional film sticking / positioning device capable of reducing the defects of the CRT 4 caused by the above.

[0013]

As shown in FIG. 1, a film sticking positioning device of the present invention takes out a film 1 cut into an area equal to or smaller than the surface to be stuck and puts it in a film sticking positioning device 18. A film sticking positioning device 18 for sticking the film 1 on the sticking surface 11 after the film 1 is positioned at the position where it is placed and conveyed. 18
Is composed of a plurality of rollers 19 which are arranged side by side rotatably in the transport direction and whose surfaces are mirror-finished and whose length is longer than the film width. The film 1 placed on the rollers 19 causes the plurality of rollers 19 to rotate synchronously. It is configured such that the positioning is performed after the sheet is conveyed and conveyed.

According to the film sticking positioning device of the present invention, the functional film is positioned at the correct position,
Moreover, the inner surface (back surface) of the functional film 1 may be scratched,
It is possible to obtain a product that does not adhere dust.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the film sticking positioning device of the present invention will be described in detail below with reference to FIGS. 1 is a schematic process diagram in which the film sticking positioning device of the present invention is used, FIG. 2 is a plan view of the film sticking positioning device of the present invention, and FIGS. 3A and 3B are front views of FIG. 1 and operation of a stopper portion. FIG.

First, referring to FIG. 1, a process of adhering a functional film on the face panel surface of a CRT 4 in which the film adhering / positioning device of this embodiment is used will be described.

As shown in FIG. 1, a film sticking device in which the film sticking positioning device of the present invention is used is a CRT.
4 is a functional film 1 cut into an area equal to the area of the face plate 11, and a cassette 21 in which a plurality of functional films 1 to which a gripping tape 16 (see FIG. 6) is temporarily adhered are stored. Have. A film take-out head 20 is provided on the cassette 21 as a first conveying means, and the functional films 1 in the cassette 21 are sucked by vacuum suction so that the functional films 1 can be taken out one by one from the cassette 21. . The cassette 21 in which the functional film 1 is emptied and emptied is automatically sent out, and the cassette 21 in which the functional film 1 is accommodated is arranged below the film unloading head 20.

The functional film 1 picked up by the film take-out head 20 is placed on the film sticking positioning device 18 having a conveyor structure. Of course, the primer layer 3a below the PET 2 of the functional film 1 is placed so as to be in contact with the roller 19.

As will be described later, the film sticking / positioning device 18 has a plurality of rollers 19, a motor 22 for synchronously driving these rollers 19, and a drive power of the motor 22 transmitted to each roller 19, for example, like a chain. It is composed of a non-stretchable transmission means 23.

An ion air blow 24 is disposed on the lower surface of the film sticking positioning device 18, and the functional film 1 with a gripping tape placed on the roller 19 of the film sticking positioning device 18 is positioned at a predetermined position. When positioning in the width direction (Y-axis direction) of the functional film 1 that is orthogonal to the transport direction (X-axis direction) and the X-axis}, an air flow containing positive and negative ions is applied to the lower surface of the functional film 1 from the ion air blow 24. Positioning is performed while the functional film 1 is blown and the functional film 1 is floated.

The ion stream of the ion air blow 24 causes scratches 17 on the primer layer 3a along the longitudinal direction of the roller 19 which occurs during positioning in the width direction (Y-axis direction).
Can be prevented.

Further, the motor 22 is controlled by a microcomputer (hereinafter referred to as CPU) 30. CPU3
The control data of 0 is a digital-analog conversion circuit (hereinafter D
An analog control signal from the DAC 25 drives and controls the motor 22 via the motor drive circuit 26.

The air from the air source 27 is filtered by the air filter 28. The air filtered by the air filter 28 is fed through the controller 29 to the ion air blow 2
4 is supplied. The CPU 30 controls the controller 29 to control the amount of air blown up.

A protective cover 31 for preventing dust from falling is provided on the film sticking / positioning device 18, and an exhaust tube or the like for exhausting the air from the ion air blow 24 can be provided if necessary.

The functional film 1 with the gripping tape placed on the film sticking positioning device 18 is conveyed on the roller 19 and positioned at a predetermined position. This positioning position is performed on the CRT 4 side.

The funnel and neck of the CRT 4 are positioned and supported by the CRT positioning device 32. Above the CRT 4 supported by the positioning device 32, a pressing unit 33 as pressing means is arranged.

The pressing unit 33 is arranged so as to be capable of reciprocating in the horizontal direction (XX direction), and at a position close to the right end of the film sticking positioning device 18, the functional film 1 with the gripping tape is transferred from the transport roller 19 to Film transport roller 3
4 and the pressing roller 35, and they are positioned on the conveying roller 36. In this state, the pressing roller 13 moves the actuator 3
It has moved to the upper limit position by 7. The pressing roller 35
Is movable up and down by an actuator 38, and the transport rollers 34 and 36 are driven by a transport motor 39.

The pressing unit 33 having received the functional film 1 from the film sticking / positioning device 18 positions the functional film 1 on the face panel 11 of the CRT 4. A gripping device 40 as a gripping means is installed near the CRT positioning device 32. The gripping device 40 includes a chuck 41 for gripping the gripping tape 16 and a chuck 4
1 for moving 1 horizontally in the XX direction
2 and an actuator 43 that moves vertically in the Y-Y direction. The chuck 41 grips the gripping tape 16 temporarily adhered to the functional film 1 with the chuck 41 with the pressing roller 13 in the upper limit position, and then,
Functional film 1 on the side where the gripping tape 16 is temporarily adhered
Of the face panel 1 by the actuator 43.
Lower to the surface position of 1. The pressure roll 13 presses the end of the functional film 1 on the side where the gripping tape 16 is temporarily adhered to the surface position of the face panel 11 by the actuator 37 in synchronism with or without the movement.

After that, the gripping tape 16 is attached to the chuck 4
While holding with 1, the pressing unit 33 is moved along the XX direction to the film sticking positioning device 18 side,
The pressing roller 13 is moved from the gripping tape 16 side along the surface of the face panel 11. As a result, the surface of the functional film 1 is pressed against the face panel 11 by the pressing roller 13, the thickness of the ultraviolet curing adhesive 5 shown in FIG. 4 is made uniform, and the functional film 1 is adhered so that no lines or wrinkles appear on the surface. . The thickness of the ultraviolet curable adhesive 5 is 0.05 to
It is preferably about 2.5 mm. As the pressing roller 13,
A hard rubber roller or a rubber-lined metal roller can be used.

The CRT 4 to which the functional film 1 is adhered by the device shown in FIG. 1 is transferred to a step for curing the ultraviolet curable adhesive 5 located between the functional film 1 and the face panel 11. After the functional film 1 is attached to the surface of the face panel 11, the gripping tape 16
The gripping tape 16 can be easily peeled from the functional film 1 only by exerting a force for peeling it from the functional film 1 (a force having a vertical component with respect to the film 1). Therefore, the automation of the work is easy although not shown.

An embodiment of a film sticking positioning device for positioning the functional film 1 with a gripping tape stuck on the face panel 11 of the above-mentioned CRT 4 is shown in the plan view of FIG. 2 and the front view of FIG. 3A and the stopper of FIG. 3B. This will be described in detail using a partial front view.

2 and 3A and 3B, the functional film 1 with the gripping tape is adsorbed by the film take-out head 20 from the cassette 21 and closely arranged in the conveying direction D of the film sticking positioning device 18. 19 is mounted.

The plurality of conveying rollers 19, 19 ... Arranged side by side in the conveying direction are pivotally mounted between the left and right side plates 45L and 45R. In FIG. 2, one roller 19
Only the left and right side plates 45 are shown as shown in FIG.
The flexible functional films 1 in the longitudinal direction of L and 45R are arranged side by side so as to maintain a stable posture. These rollers 19 have flange portions 46L and 46R formed at both ends of the rollers, and the diameters of the flange portions 46L and 46R are selected to be larger than the diameter of the roller 19.

The roller 19 is made of a cylindrical metal material, and its surface is mirror-finished by hard chrome plating. A shaft 47 is inserted into the roller 19 and a flange portion 46 is inserted.
The shaft 47 is fixed by L and 46R. As shown in FIG. 3A, the left and right ends of the shaft 47 penetrate through the left and right side plates 45L and 45R, and are rotatably pivoted through bearings, and a collar 48 and a chain wheel 49 are pivotally attached to the penetrating shaft portion. ing.

A motor 22 for rotating a plurality of rollers 19, 19 ... Is disposed in the upper rear portion of the right side plate 45R, and a chain wheel 50 is pivotally attached to the motor shaft. As shown in FIG. 1, the chain 23 is stretched between a plurality of chain wheels 48 and 50 so that they can be driven synchronously.

Further, the left and right side plates 45L below the motor 22
And 45R, cross-linked support rods 51F and 51B are arranged at a predetermined interval. Front and rear support rods 5
A rod-shaped guide member 52 made of synthetic resin or the like is provided at the lower ends of 1F and 51B.
L and 52R are cross-linked and fixed, and the rollers 19, 19
Controls the lifting of the functional film 1 placed on the upper side. Of course, the upper surface of the functional film 1 is the guide member 52.
The height is selected so as not to touch L and 52R.

On the CRT positioning device 32 side of the left and right side plates 45L and 45R, plate-shaped guide members 53L and 53R for restricting the left and right sides of the functional film 1, that is, the width direction are arranged in parallel with the left and right side plates 45L and 45R. A guide rod 54, which penetrates the left and right side plates 45L and 45R and is movable along the longitudinal direction of the roller 19 as shown by an arrow E, is fixed to the guide members 53L and 53R. The actuator part is fixed. The other ends of the guide rod 54 and the cylinder 55 are fixed to the moving plate 56,
By driving the cylinder 55, the guide members 53L and 53L
R moves in the direction of arrow E.

An ion air blow 24 is arranged below the plurality of rollers 19, 19 ... Arranged side by side, as shown in FIG. Spray on.

As shown in FIG. 1, two stoppers 57 for restricting the functional film 1 at the final position in the conveying direction (D direction) are provided near both ends in the longitudinal direction of the roller 19, and the functional films are provided above and below the substantially central position. Photoelectric sensor 58 for detecting the edge
Is provided.

FIG. 3B is a front view as seen from the direction of arrow F in FIG. 1. The two stoppers 5 are attached to the rotary rod 59 which is rotatably and pivotally mounted between the left and right side plates 45L and 45R.
Fix 7 The stopper 57 has a plate-like rectangular shape,
The lengthwise direction of the rectangular portion is selected to be a length below the upper surface of the final roller 19 to prevent the functional film 1 from being discharged in the transport direction. A rotary actuator 60 is fitted to one end of the rotary rod 59. By rotating the rotary reactor 60, the state shown in FIG. 3B is obtained so as to prevent the functional film 1 from being discharged. When the functional film 1 is discharged, the stopper 57 is rotated to rotate the stopper 57.
The longitudinal direction of is rotated 90 degrees from the position of FIG. 3B, and the functional film 1 can be taken out.

The operation of the film sticking positioning device 18 will be described below with reference to FIGS. 1 to 3A and 3B. From the cassette 21 laminated with the functional film 1 to which the gripping tape 16 has been temporarily adhered, one functional film 1 is picked up by the film take-out head 20 and is placed on the rollers 19, 19 ... When mounted, the CPU 30 drives the rotary reactor 60 shown in FIG. 3B and operates the stopper 57 to prevent the functional film 1 from being discharged.

Next, the CPU 30 drives the motor 22 for rotating the rollers 19, 19 ... By means of the DAC 25 and the motor drive circuit 26, and the transmission means 2 such as a chain.
A chain wheel 4 fitted to the rollers 19, 19 ...
9 is rotated to rotate the rollers 19, 19 ...
The rollers 19, 19 ... Are densely arranged so that the functional film 1 can maintain a stable posture, and the surfaces of the rollers are mirror-finished by hard chrome plating or the like, so that the functional film 1 is coated on the back side with a soft surface. It does not damage the primer layer 3a. Also, the rollers 19, 19 ...
Is a non-stretchable transmission member different from a rubber belt such as a chain, which transmits the rotational force and is operating synchronously.
It is possible to prevent slippage between the rollers 19 and 19 and the functional film 1 due to uneven rotation of the rollers 9. Further, the contact surface between the rollers 19, 19 ... And the functional film 1 is a linear contact, and the contact area is small, and since it rotates, the adhesion of dust to the back surface of the functional film 1 and the dust on the rollers 19, 19 ,. Accumulation can be prevented.

The functional film 1 placed on the rollers 19, 19 ... Is regulated in the left and right widthwise movement positions by the flange portions 46L and 46R, and is guided by the guide members 52L and 52R.
The sheet is conveyed in the direction of the discharge position of the film sticking positioning device 18 while the upward warpage and the like are restricted.

When the leading end of the functional film 1 in the conveying direction comes into contact with the stopper 57, the sensor 58 including a light emitting element and a light receiving element detects the film edge of the functional film 1, and the detection signal is supplied to the CPU 30 to cause the CPU 30.
Turns the motor drive circuit 26 into a non-driving state, and turns off the motor 22.

Next, the CPU 30 controls the controller 29 so that the air from the air source 27 is blown by the ion air blower 2.
4 is blown up to disperse dust and drive the cylinder 55 so that the left and right guide members 53L and 53
The position of the left and right ends of the functional film 1 in the width direction is regulated by R, the position of the functional film 1 is regulated in the X and Y axis directions (the transport direction and the width direction), and the functional film 1 is positioned at the correct position.

Since the functional film 1 is positioned in a floating state during the above-described widthwise positioning, it is possible to prevent the back surface of the functional film 1 from being scratched along the longitudinal direction of the rollers 19, 19. .

Next, the blow-up operation of the ion air blow 24 is stopped and the cylinder 55 is turned "off" to return the guide members 53L and 53R to their original positions.

Since the film sticking positioning device of the present invention is constructed and operates as described above, the scratches generated on the inner surface of the functional film can be reduced, and the positioning of the functional film 1 is restricted to the correct position. , CRT handling can be automated.

In the above-mentioned embodiment, the case where the film is attached to the face panel surface of the CRT has been described, but it is clear that it can be applied as a positioning function when the film or the like is automatically attached to other adherends. Is.

[0050]

According to the present invention, it is possible to obtain a film sticking positioning device capable of regulating the transfer of a functional film to a predetermined position without damaging the inside of the extremely flexible functional film or attaching dust to the functional film. It is possible to obtain a device in which the positioning is accurately performed, and the process of attaching to the adherend after handling can be easily automated. Further, it is possible to obtain a high-quality CRT which does not have a screen glare after the functional film is attached to the CRT or a screen in which a shadow of a foreign substance appears.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a film sticking device in which a film sticking positioning device of the present invention is used.

FIG. 2 is a plan view showing an embodiment of the film sticking positioning device of the present invention.

FIG. 3 is a front view showing an embodiment of the film sticking positioning device of the present invention.

FIG. 4 is a cross-sectional view of a conventional functional film.

FIG. 5 is an explanatory view of a conventional functional film attaching step.

FIG. 6 is a partial plan view of a conventional positioning device.

[Explanation of symbols]

1 functional film, 4 CRT, 18 film sticking positioning device, 19 roller, 24 ion air blow,
33 Pressing unit

Claims (5)

[Claims] 1. A film cut into an area equal to or smaller than the surface to be adhered is taken out, placed on a film sticking positioning device, and positioned on the conveyed position, and then the film is positioned on the surface to be stuck. A film sticking positioning device configured to stick the film, wherein the film sticking positioning devices are arranged side by side rotatably in the transport direction, the surfaces of which are mirror-finished and which are longer than the width of the film. A film sticking / positioning device comprising a roller, wherein the film placed on the roller is positioned after the plurality of rollers are synchronously rotated and conveyed. 2. The film sticking positioning device according to claim 1, wherein ion film is blown so as to float the film when the film is transported and / or when the film is positioned. 3. The film sticking positioning device according to claim 1, wherein the transmission means for synchronously driving the plurality of rollers is composed of a non-stretchable member. 4. The film-conveying-direction positioning detection means is arranged so as to be orthogonal to the surface of the film, and is arranged at a substantially central position in the width direction of the film. The film sticking positioning device according to any one of claims 1 to 3. 5. The film is pulled out by rotating the stopper in the transport direction after the film is positioned in the transport direction and positioned in the width direction of the film. The film sticking positioning device according to claim 4.