JP3361209B2 - Method and apparatus for attaching optical functional film to plate - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for attaching an optical functional film used for a head-up display, a high mount stop lamp or the like to a plate-shaped body such as a plate glass.

[0002]

2. Description of the Related Art Conventionally, when an optical functional film used for a head-up display, a high mount stop lamp or the like is pasted on a plate glass as a window glass, a mounting table as shown in the embodiment is used. Although the plate glass was put on and the marks and the like attached to the mounting table were manually attached as marks, the workability was poor, and it was difficult to attach them accurately at a predetermined position.

The present invention has been made in view of the above points, and is a method for improving workability and accurately attaching an optical functional film to a plate-like body such as a plate glass at a predetermined position. And to provide a device.

[0004]

[Means for Solving the Problems] The pasting method of the present invention comprises:
In a state in which the plate-shaped body is positioned and placed on the mounting table, the optical functional film is placed in the hollowed opening of the positioning film rotatably arranged on the working table adjacent to the mounting table. And the optical functional film is attached to a predetermined position of the plate-shaped body by inverting and rotating the positioning film to the plate-shaped body side. Adhesion of the optically functional film to the plate-shaped body is preferably performed by pressing a roller having a shape that substantially matches the curvature of the plate-shaped body.

Further, as an apparatus for specifically carrying out this method, the upper surface is formed to have substantially the same curvature as that of the plate-like body,
A mounting table having a positioning stopper, a work table adjacent to the mounting table and having an adjacent surface formed higher than the mounting table by a thickness of a plate-like body, and a plate-shaped support rotatably supported on the work table. Inverting to the body side, at a position that becomes a predetermined position of the plate-shaped body when rotated, at least a positioning film having a hollow shape substantially the same as the optically functional film is provided, Further, a temporary adhesive tape which is below the positioning film and which is adhered so as to protrude inside the opening along the periphery of the opening and has a weaker adhesive force than the adhesive of the optically functional film is provided. It is preferable that at least the upper surface portion of the workbench which is provided with the workbench is formed in a planar shape.

[0006]

When the positioning film is rotated, it is hollowed out at a position that exactly matches the predetermined position of the plate-like body, the optical functional film is temporarily adhered to that portion, and then the positioning film is attached to the plate-like body. When it is rotated in the direction of, the position corresponds exactly to the predetermined position of the plate-shaped body, and when it is pressed and bonded by a roller or the like that preferably substantially matches the curvature of the plate-shaped body, it is possible to quickly bond. In addition, it is possible to accurately adhere to a predetermined place.

If at least the surface of the workbench that is to be temporarily bonded is formed to be a flat surface and is temporarily bonded to a temporary adhesive tape having a weaker adhesive strength than the adhesive layer laminated on one side of the optical functional film, Since the property is improved and it can be accurately pasted, finally, the optical functional film can be accurately pasted at a predetermined position of the plate-shaped body.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings, in which a hologram sheet used as a combiner for a head-up display is attached as an optically functional film to a curved plate glass having a three-dimensional curved surface shape which is a windshield for a vehicle. The case will be described in detail.

FIGS. 1 to 3 are views showing a sticking apparatus of the present invention, and FIGS. 1 and 2 are perspective views and essential parts of a temporary bonding of an optical functional film to a positioning film, respectively. FIG. 3 is a front view, and FIG. 3 is a perspective view of a main part when the optical functional film is attached to the plate-shaped body.

The hologram sheet as the optically functional film 1 is made of a photosensitive material such as a photopolymer, a laser light source,
A beam splitter, a microscope objective lens, forming interference fringes by the optical system such as a reflective mirror, then are those obtained by the conventional development process, on both sides of the hologram sheet only through the adhesive layer 1 ₁ one is a polyethylene terephthalate (PET) film 1 _2, 1 ₃ for releasing those bonded.

The pasting device of the present invention has a plate-like body 2 on its upper surface.
The platen is formed to have almost the same curvature as the curved plate glass and has the positioning stoppers 3 ₁ and 3 ₂ , and the adjacent surface adjacent to the platen is formed higher than the platen by the thickness of the plate-shaped body. , A work table 4 having a flat upper surface, and a positioning film 5 rotatably supported on the work table 4 by means of a stopper 5 ₁ and a screw 5 ₂ , and a predetermined plate-like body when rotated. The opening 5 ₃ having substantially the same shape as the pressure-sensitive adhesive film is formed at a position corresponding to the position, and the adhesive force is relatively weak so that the peripheral portion of the opening 5 ₃ protrudes to the inside of the opening.
For example adhesive force bonding the like surface protective film 363 system manufactured by Nitto Denko Corporation is about 250 g / 20 mm as a temporary adhesive tape 5 _4, thickness is composed of positioning the film 5, such as PET of about 100μm It

A procedure for attaching an optical functional film using such an apparatus will be described. First, when the convex surface of the curved plate glass having a three-dimensional curved surface as the plate-like body 2 is placed on the mounting table and brought into contact with the adjacent surfaces of the stoppers 3 ₁ , 3 ₂ and the work table, at least three points are fixed. Therefore, the plate-like body is accurately positioned in this state.

Next, the surface of the hologram sheet, which is an optically functional film, to be adhered to the plate-shaped body is turned up, and the opening 5 ₃
The optical functional film is temporarily adhered to the temporary adhesive tape protruding from the inside of, and when the temporary adhesion is completed, the release film at the top is peeled off.

After that, the positioning film is inverted and rotated in the direction of the plate-like body, and the positioning film is pressed by the drum-shaped roller 6, the optical functional film is bonded to the plate-like body, and the positioning film 5 is formed. Peeling from the optical functional film 1, flipping and turning to the workbench 4 side to complete the sticking work to one plate-like body, and if this work is continued in succession, a large number of sticking works can be performed quickly. Moreover, it can be pasted in the correct position.

The thus obtained plate glass, which is a plate-like body, is subjected to a combination treatment with another plate glass through an interlayer film such as polyvinyl butyral and mounted as a windshield for automobiles. It can be applied as a HUD by illuminating the hologram with operation information and the like.

Although the preferred embodiments have been described above, the present invention is not limited to these, and various applications are possible. The optical functional film is not limited to the hologram sheet, but it is a polarization rotator such as an optical rotator such as a liquid crystal polymer that has a twisted nematic orientation in a liquid crystal state and becomes a glass state at a liquid crystal transition point or a polarization direction of a λ / 2 plate or the like An optical functional film such as a direction adjusting film and a film having a semi-transparent and half-mirror function having a reflective property can be used.

In addition to the plate glass, a transparent resin such as a polycarbonate resin or an acrylic resin may be used for the plate-shaped body, and the bonding method and the bonding device of the present invention having a curved shape are particularly effective. However, of course, it may be a flat plate.

Regarding the mounting table and the work table, the upper surface of the mounting table may be shaped so as to conform to the curvature of the plate-shaped body. In the embodiment, the convex surface of the plate-shaped body is directed downward, so that it conforms to that shape. However, the convex surface of the plate-shaped body may be placed upward, and in this case, the upper surface of the mounting table may be formed in a convex shape. The roller may be formed in a drum shape so as to match the curvature.

Although the upper surface of the workbench does not necessarily have to be an accurate planar shape, from the viewpoint of workability, it is better to form a planar shape at least in the place where the optical functional film is temporarily bonded to the positioning film. Further, it is preferable that the adjacent surface adjacent to the mounting table is formed to be higher than the mounting table by about the thickness of the plate-shaped body so that there is no step when the optical functional film is attached to the plate-shaped body, but a step up to about 10 mm is preferable. If so, the effect is small and acceptable.

The adjoining portion of the workbench does not necessarily have to match the outer shape even if the outer shape of the portion with which the plate member abuts is curved. Even if the body is curved in the depth direction,
If the degree is small, it is sufficient to form the entire upper surface of the work table into a flat surface.When the plate body has a large degree of curvature, only the adjacent portion of the work table and its vicinity should be curved to match the curvature of the plate body. Therefore, it is preferable that the other temporary adhesion portions are formed flat so that workability can be improved.

The positioning film can be used as a film other than the PET film as long as it is flexible and has appropriate rigidity. In addition, the opening that is hollowed out at a position that becomes a predetermined position of the plate-shaped body when inverted and rotated to the plate-shaped body side has substantially the same shape as the optical functional film and has a slightly larger size, for example, per side. It is preferable to increase the size by about 5 mm, but since it is sufficient to temporarily bond the two adjacent sides of the opening as a reference, the size can be increased to about 10 mm per side.

The temporary adhesive tape adhered to the periphery of the positioning film opening or at least a part thereof has a relatively weak adhesive force, for example, 100 g / 20 mm to 500 g /
An adhesive tape having an adhesive strength of about 20 mm may be used.

[0023]

According to the method and apparatus of the present invention, it is possible to attach an optical functional film to a plate-like body such as curved glass, which has been difficult to attach in the past, and to perform a remarkable work. It is possible to improve the property and further to accurately adhere it to a predetermined place.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part when an optical functional film is temporarily bonded to a positioning film in a pasting device of the present invention.

FIG. 2 is a front view of a main part when the optical functional film is temporarily adhered to the positioning film in the pasting device of the present invention.

FIG. 3 is a perspective view of a main part when an optical functional film is attached to a plate-shaped body in the attaching device of the present invention.

[Explanation of symbols]

1 Optical functional film 2 Plate-like object 3 Mounting table 4 Working table 5 Positioning film 5 ₃ Opening 5 ₄ Temporary adhesive tape 6 Roller

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI G02B 7/00 G02B 7/00 F // G02B 27/02 27/02 A (56) Reference JP-A-6-71756 (JP , A) JP-A-6-71760 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) C03C 15/00-23/00 B32B 1/00-35/00 B29C 63/00 -65/82 C09J 5/00

Claims (5)

(57) [Claims] 1. A method of sticking an optical functional film having an adhesive layer laminated on one side to a plate-shaped body, the plate-shaped body being positioned and mounted on the mounting table, the mounting table. The optical functional film is temporarily adhered to the workbench adjacent to the workbench by the workbench in the hollowed-out opening of the positioning film, and then the positioning film is inverted and rotated to the plate-like body side. The optical functional film is attached to a predetermined position of the plate-shaped body, and the optical functional film is attached to the plate-shaped body. 2. The positioning film is turned upside down and rotated toward the plate-like body, and the optical functional film is attached to the plate-like body by pressing a roller having a shape substantially matching the curvature of the plate-like body. The method according to claim 1, wherein the optical functional film is attached to the plate-like body. 3. A device for sticking an optical functional film having a pressure-sensitive adhesive layer laminated on one side to a plate-shaped body, the upper surface of which is formed to have substantially the same curvature as that of the plate-shaped body and having a positioning stopper. A table, a work table adjacent to the table, the adjacent surface of which is formed higher than the table by the thickness of the plate, and a work table which is rotatably supported by the table so as to be inverted and rotated toward the plate. The plate-shaped optical member is characterized in that at least a positioning film having a substantially same shape as that of the optical functional film is provided at a position that is a predetermined position of the plate-shaped member when the optical device is used. Functional film sticking device. 4. An adhesive which is below the positioning film and sticks out along the periphery of the opening to the inside of the opening, and has a weaker adhesive force than the adhesive of the optical functional film. The device for attaching an optical functional film to a plate-like body according to claim 3, characterized in that it is provided with a temporary adhesive tape. 5. An apparatus for sticking an optical functional film to a plate-like body according to claim 3 or 4, wherein at least an upper surface portion of the workbench to be temporarily bonded is formed in a planar shape.