JP2000177086A - Film bonding apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep a bonded film free from distortion by executing film bonding and adhesive curing with reference to an object with an adhesive applied on the surface, and furnishing an antistatic member to be in close contact with the curing period of an adhesive. SOLUTION: When a film 21 is bonded, at least, a support stage is moved to a position A; then placed and fixed thereon is a glass plate 20 with a UV ray curable type adhesive 22 applied on the surface. Subsequently, the film 21 is supplied on the glass plate 20, and a bonding roller 13 is moved downward to be in contact with the lateral peripheries of the film 21. As such, by permitting the bonding roller 13 to be moved in a horizontal direction, the film 21 is pressed to the glass plate 20. After that, the support stage and movement glass state 12 are moved to a position B so that the close contacting surface of a charge plate 14 is put in close contact with the surface of the film by an air cylinder. By keeping this state, adhesive 22 is irradiated with UV rays emitted from a UV ray lamp 16 in order to cure adhesive 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film sticking apparatus for sticking a film to a plate such as glass via an adhesive.

[0002]

2. Description of the Related Art Conventionally, when a film is attached to a plate material such as glass via an adhesive, for example, as shown in FIG. 6, an ultraviolet curing adhesive 2 is applied to the surface of a plate material 1 such as glass. The film 3 is placed on the surface of the plate 1, and the film 3 is pressed and adhered to the plate 1 via an adhesive 2 by a roller or the like (not shown), and then the adhesive is irradiated with ultraviolet rays. 2 is cured, and the film 3 is attached.

Here, when the adhesive 2 is cured, the adhesive 2 undergoes curing shrinkage. Therefore, the adhesive 2 is cured by holding down the film 3 with the glass plate 4 from above. .

[0004]

However, since the above-mentioned curing shrinkage of the adhesive 2 is not uniform over the entire surface to which the film 3 is attached, as shown in FIG. There is a problem that distortion occurs and quality is reduced.

SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to provide a film sticking apparatus which does not cause distortion of a stuck film due to curing shrinkage of an adhesive.

[0006]

According to the present invention, there is provided, according to the present invention, a support means on which an object on which a film is to be attached is placed, and an adhesive applied to the surface supported by the support means. For the object, a film affixing means for applying a film, a curing means for curing the adhesive applied to the surface of the object, and when the adhesive is cured by the curing means, the film is affixed to the surface of the object. This is achieved by a film sticking device including a charging member that is in close contact with a film and a power supply that applies a predetermined voltage to the charging member.

[0007] According to the above arrangement, the charging member is placed on the film with the film affixed to the surface of the object supported by the support means and coated with an adhesive. When a voltage is applied to the charging member in close contact, the charging member is charged,
The film comes into close contact with the contact surface of the charging member due to static electricity.

In this state, even if the adhesive shrinks by curing the adhesive by the curing means, the film itself is electrostatically adsorbed to the contact surface of the charging member and the film of the charging member is Since it is held in the shape of the contact surface, it is not affected by the curing shrinkage of the adhesive. As a result, the film attached to the surface of the object after the adhesive is cured does not undulate due to uneven curing shrinkage of the adhesive, and is attached without distortion.

In the case where the surface of the charging member, which is in close contact with the surface of the film, has a shape corresponding to the surface of the object, the surface of the object may or may not be flat. Also, since the film electrostatically attracted to the contact surface of the charging member is held in a shape corresponding to the surface of the object, a film without distortion can be obtained, for example, protecting the glass panel surface of the cathode ray tube. When a film as a film or an antireflection film is stuck, the film is stuck without distortion.

In the case where the contact surface of the charging member is kept at a fixed distance from the object when the adhesive is cured,
The film affixed to the surface of the object due to the curing of the adhesive is always located at a fixed distance from the surface of the object.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIGS. still,
Since the embodiments described below are preferred specific examples of the present invention, various technically preferred limitations are added.
The scope of the present invention is not limited to these embodiments unless otherwise specified in the following description.

FIG. 1 and FIG. 2 show an embodiment of a film sticking apparatus to which the present invention is applied. In FIG.
The film sticking apparatus 10 includes a support stage 11 (see FIG. 2) as a support means, a movable glass stage 12 fixedly arranged on the support stage 11, a sticking roller 13 as a film sticking means, and a charging member as a charging member. Board 14
And a power supply 15 for applying a predetermined voltage to the charging plate 14 and an ultraviolet lamp 16 as a curing means.

The support stage 11 is supported by a plurality of drive rollers 11a and is configured to move in the left-right direction in FIG. These drive rollers 11
a is driven to rotate by a motor (not shown). Thereby, the support table 11 is driven right and left by an operation of a drive motor (not shown) as shown by an arrow X in FIG. 1 and a first position A shown on the left side of the drawing.
And a second position B shown on the right side of the drawing.

The movable glass stage 12 is fixedly held on the upper surface of the support stage 11 so as to move integrally with the support stage 11 and, on the upper surface thereof, a glass plate 20 as an object to which a film is to be attached. It is to be placed.

The sticking roller 13 has a known structure used in a conventional film sticking apparatus, and is disposed above a first position A of the support stage 11 in FIG. When the film 21 is supplied by a film supply unit (not shown), the film 21 is lowered on one side and moved in the horizontal direction by an actuator and a guide mechanism (not shown) as shown by an arrow C in FIG. Is configured to rise.

The charging plate 14 is disposed above the second position B of the support stage 11 in FIG. 1, and is supported by a connecting plate 17, as shown in FIG. The connecting plate 17 is configured to be moved up and down by an air cylinder 18 as shown by an arrow D in FIG.
When the charging plate 14 is lowered, the lower limit position is determined by a stopper (not shown). Thereby, the charging plate 1
Numeral 4 is set so that the lower surface (close contact surface) and the upper surface of the glass plate 20 have a constant distance at this lower limit position.

Here, the contact surface of the charging plate 14 is formed in a shape corresponding to the surface of the glass plate 20 which is the above-mentioned object, and is flat in the case shown in the figure. Further, the charging plate 14 is electrically connected to a power supply 15,
5, a predetermined voltage is applied, whereby the charging plate 14 is charged.

The ultraviolet lamp 16 is disposed below the second position B of the supporting stage 11 in FIG. 1, and is a glass plate as an object supported by the moving glass stage 12 on the supporting stage 11. 20 is irradiated with ultraviolet rays.

The film sticking apparatus 10 according to the present embodiment
Is configured as described above, and operates as follows when attaching a film. First, as shown in FIG. 3, the support stage 11 is moved to the first position A, and the glass plate 20 having the surface coated with the ultraviolet curing adhesive 22 is placed on the support stage 11 and fixed. Will be retained.
Then, the film 21 is supplied and placed on the glass plate 20 by a film supply means (not shown).

Subsequently, the sticking roller 13 is moved in the direction indicated by the arrow C in FIG.
As shown in FIG. 7, the film 21 is pressed against the glass plate 20 while rolling on the surface of the film 21 by moving in the horizontal direction by contacting one side edge of the film 21. Then, after reaching the other side edge of the film 21, the sticking roller 13 is raised. This allows
The film 21 is stuck over the whole.

Thereafter, as shown in FIG. 4, the support stage 11 and the moving glass stage 12 move rightward in FIG. Then, as shown in FIG. 5, the air cylinder 18 operates to lower the connecting plate 17 and the charging plate 14, and the contact surface 1, which is the lower surface of the charging plate 14,
The lowering of the charging plate 14 is stopped in a state where 4a is in close contact with the surface of the film 21.

In this state, when a voltage is applied from the power supply 15 to the charging plate 14, the charging plate 14 is charged, and the film 21 is attracted to the contact surface 14a of the charging plate 14 by electrostatic attraction. Will be done. When the ultraviolet lamp 16 is turned on, the ultraviolet lamp 16 is turned on.
The ultraviolet light emitted from the substrate passes through the glass plate 20 from below and irradiates the ultraviolet-curable adhesive 22 to cure the ultraviolet-curable adhesive 22.

At this time, even if the UV-curable adhesive 22 cures and shrinks, the film 21 is in close contact with the contact surface 14a of the charging plate 14, so that the UV-curable adhesive 22 is not uniform. By curing shrinkage, the film 21
Is not wavy, and the distortion of the film 21 is suppressed. When the ultraviolet-curable adhesive 22 is completely cured, the film 21 is attached to the surface of the glass plate 20 via the ultraviolet-curable adhesive 22.

In this case, since the shape of the film 21 is kept in close contact with the contact surface of the charging plate 14, the film 21 does not undulate and the distortion of the film 21 is eliminated. . Therefore, the quality of the glass plate 20 to which the film 21 is attached is improved. Further, as described above, the charging plate 14 is stopped at the lower limit position by a stopper (not shown) when the charging plate 14 is lowered.
The distance between the contact surface 4 and the surface of the glass plate 20 is always constant. Thus, the film 21 is always kept on the glass plate 20.
Since it is located at a fixed distance from the surface of the product, variations between products are reduced.

As described above, according to the present embodiment, the film is adhered to the surface of the object, which is supported by the support means and the surface of which is coated with the adhesive, by the film affixing means. When a voltage is applied to the charging member by bringing the charging member into close contact with the charging member from above, the charging member is charged, and the film comes into close contact with the contact surface of the charging member due to static electricity. In this state, by curing the adhesive by the curing means, even if curing shrinkage of the adhesive occurs, the film itself is electrostatically attracted to the contact surface of the charging member, and the film of the contact surface of the charging member is Because it is held in shape, it is not affected by cure shrinkage of the adhesive. As a result, the film attached to the surface of the object after the adhesive is cured does not undulate due to uneven curing shrinkage of the adhesive, and is attached without distortion. Therefore, film distortion does not occur, and the quality of the film pasted product is improved,
In particular, when the object is an optical component to which a film is attached, deterioration of optical performance due to distortion of the film is eliminated, and a highly reliable optical component can be obtained.

In the above-described embodiment, the case where the film 21 is adhered to the surface of the flat glass plate 20 as the object has been described. However, the present invention is not limited to this. Even in the shape of
By forming the contact surface of the charging plate 14 in a shape corresponding to the surface shape of the object, distortion of the film 21 is eliminated. Thereby, for example, even when a film for a protective film or an antireflection film is attached to the glass panel surface of the cathode ray tube, the distortion of the film is eliminated, so that the quality of the cathode ray tube is improved. .

In the above-described embodiment, the ultraviolet curing adhesive 22 is used as the adhesive, and the ultraviolet lamp 16 is used for curing the adhesive. However, the present invention is not limited to this. An agent such as a thermosetting adhesive may be used, and the thermosetting adhesive may be heated and cured by heating means such as a hot-wire lamp.

Further, in the above-described embodiment, the lowering of the charging plate 14 is restricted by a stopper (not shown), so that the charging plate 14 is stopped at a fixed distance from the surface of the glass plate 20. However, the present invention is not limited to this.
When the pressing force on the film 21 reaches a predetermined value, the lowering may be stopped.

[0029]

As described above, according to the present invention, it is possible to provide a film sticking apparatus which does not cause distortion in a stuck film due to curing shrinkage of an adhesive.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing an embodiment of a film sticking apparatus according to the present invention.

FIG. 2 is a schematic side view of the film sticking apparatus of FIG.

FIG. 3 is a partial front view showing a main part of the film sticking apparatus of FIG. 1 in a film sticking state.

FIG. 4 is a partial front view showing a main part of the film sticking apparatus of FIG. 1 in a state of being moved to a second position.

FIG. 5 is a partial front view showing a main part of the film sticking apparatus of FIG. 1 in a state of electrostatic attraction and ultraviolet irradiation.

FIG. 6 is a partially enlarged sectional view showing a glass plate on which a film is pasted by a conventional film pasting apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Film sticking apparatus, 11 ... Support stage (support means), 12 ... Moving glass stage, 13
..Applying roller, 14 ... Charging plate (charging member), 15
... Power supply, 16 ... Ultraviolet lamp (curing means), 1
7 ... connecting plate, 18 ... air cylinder, 20 ...
Glass plate (object), 21 ... film, 22 ...
UV curable adhesive.

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 4F100 AG00 AK01A AT00B BA02 CB00 CB02 CB04 EH01 EJ08 EJ42 EJ54 EJ61 EK06 JL01 4F211 AA00 AC03 AD04 AD07 AE10 AG01 AG03 AG19 AH33 SA03 SC19 SC06 SD01 SN03 SN04 TA03 SP03 TN02 TN26 TN44 TN45 TQ13

Claims (5)

[Claims] 1. A supporting means on which an object to which a film is to be attached is placed, and a film attaching means for attaching a film to an object supported by the supporting means and having a surface coated with an adhesive. A curing unit for curing the adhesive applied to the surface of the object; a charging member that adheres to the film attached to the surface of the object when the adhesive is cured by the curing unit; and a predetermined voltage applied to the charging member. A film sticking device, comprising: a power source to be applied. 2. The film sticking apparatus according to claim 1, wherein the contact surface of the charging member that adheres to the film has a shape corresponding to the surface of the object. 3. The film sticking apparatus according to claim 2, wherein the contact surface of the charging member is held at a fixed distance from the object when the adhesive is cured. 4. The film sticking apparatus according to claim 1, wherein the adhesive is an ultraviolet curing adhesive, and the curing means is an ultraviolet lamp. 5. The film sticking apparatus according to claim 1, wherein the adhesive is a thermosetting adhesive, and the curing means is a heating means.