JPH10102010A - Sticking of hologram film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To continuously stick hologram film to a laminar member in a uniform state by a specific method using a continuous film obtained by releasably attaching a carrying film and a cover film to both sides of a hologram film. SOLUTION: A continuous film 1 obtained by releasably attaching a carrying film 4 and a cover film 6 to both sides of a hologram film 2 is moved toward a laminar member 34, which is an application target of a hologram, by a transporting mechanism. A frame-like cut is formed on a part containing a hologram memory part in which a fixed interference fringe of the cover film 6 and the hologram film 2 is memorized among the continuous film 1 to be transported by a cutting mechanism 13 or in the in the vicinity of the memory part to form a frame like hologram film 22. Then the cover film 6 and the residual hologram film except the film 22 are released from the continuous film 1 by a releasing mechanism 14 and the frame-like hologram film 22 is stuck to the laminar member 34 by a sticking mechanism 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for attaching a hologram film suitable for attaching a hologram film to, for example, a windshield or a rear glass of an automobile.

[0002]

2. Description of the Related Art In recent years, it has been studied to apply a hologram film to a combiner of a head-up display in which a hologram film is provided on a windshield for a vehicle and necessary information is superimposed on a foreground and visually recognized by a driver. 2. Description of the Related Art Conventionally, in the case of flat glass, a laminator that presses with two rollers is known as an apparatus for attaching a sheet-like hologram film to a plate-like body such as a glass plate. However, it is difficult to attach to a curved plate with a laminator,
Moreover, it has been difficult to apply the hologram film to the hologram film while applying a constant tensile force so as not to wrinkle.

For this reason, when a hologram film is attached to a curved glass plate such as a windshield for an automobile, a method of manually attaching the hologram films one by one, as disclosed in Japanese Patent Application Laid-Open No. 3-93528, is disclosed. 2. Description of the Related Art There is known a method in which a hologram film cut into sheets and cut into sheets is pasted by a sheet pasting machine.

[0004]

In the above-mentioned prior art, in the method of attaching a hologram film to a curved glass plate such as a windshield for an automobile, the hologram film formed into a sheet is manually or sheet-attached. Must be affixed to the glass plate one by one. Therefore, in the method of manually attaching the hologram film, the adhesion state of the hologram film differs for each sheet, and there is a problem that the hologram film may be wrinkled and the productivity is extremely poor.

When a hologram film is pasted by a sheet pasting machine, a constant tensile force must be applied to each hologram film to prevent wrinkling of the hologram film. It is necessary to mount a hologram film and a glass plate one by one on a sheet pasting machine. For this reason, even when a sheet pasting machine is used, there is a problem that productivity is poor and it is not suitable for mass production.

The present invention has been made in view of the above-mentioned problems of the prior art, and is directed to a method of attaching a hologram film capable of attaching a hologram film to a plate-like member such as a glass plate continuously and uniformly. The purpose is to provide.

[0007]

In order to solve the above-mentioned problems, a method for attaching a hologram film according to the present invention is described in which a transport film and a cover film are respectively releasably joined to both sides of a hologram film. A continuous step of transporting the continuous film toward the plate member to which the hologram is to be attached, and at least a predetermined interference fringe of the cover film and the hologram film among the continuous films sent in the transport step is recorded. A cutting step of forming a frame-shaped hologram film by making a frame-shaped cut in a portion including a hologram recording portion or a peripheral portion of the hologram recording portion, and a frame-shaped hologram film formed by the cutting process Except for the transport film, the cover film and the remaining hologram film It includes a peeling step of peeling the arm, and a joining step of pasted the frame-shaped hologram film located on the conveying film in the plate-like member.

[0008] In this case, a frame-shaped cut can be made in a part of the transport film in the thickness direction in the cutting step.

Further, a frame-shaped notch is formed in the cutting step to form a frame-shaped hologram film in a portion including the hologram recording portion and a ladder-shaped hologram film in other portions. After peeling off the hologram film and the cover film on the ladder-shaped hologram film, the cover film on the frame-shaped hologram film can be peeled off from the frame-shaped hologram film.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a method for attaching a hologram film according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 6 show an embodiment of the present invention.
Reference numeral 1 denotes a long continuous film. The continuous film 1 is formed by laminating a hologram film 2, a transport film 4, and a cover film 6. Here, as shown in FIG. 2, the continuous film 1 is bonded to one side 2A of the hologram film 2 so that the transport film 4 can be peeled off via an adhesive layer 3 made of an adhesive. The cover film 6 is peelably joined to the side surface 2B via an adhesive layer 5 made of a photo-curable adhesive. The continuous film 1 is formed with a size of about 30 m in the length direction, and is wound around a delivery roller 16 described later.

The hologram film 2 is made of, for example, a film-shaped photopolymer, polyvinyl carbazole, dichromated gelatin, or other photosensitive resin such as polyethylene terephthalate (PET), polyvinyl alcohol (PVA), or vinyl chloride. Is formed with a thickness T1 of, for example, 50 .mu.m.

Each of the hologram recording portions 7 having a substantially rectangular shape and having a predetermined pitch P in the longitudinal direction is provided on the photopolymer or the like of the hologram film 2 at a distance. Here, in each of the hologram recording sections 7, for example, a laser light source and a mirror are arranged to face each other with a photosensitive material of the hologram interposed therebetween. A predetermined interference fringe is recorded by using the reflected light from the light as the reference light. The hologram recorded in this way becomes a reflection hologram, for example, when pasted on the windshield of an automobile,
An optical signal from a light source provided on an instrument panel or the like is reflected to the driver side, and necessary information can be perceived by the driver.

The transport film 4 is made of a transparent resin material such as polyethylene terephthalate (PET) and has a thickness T 2 of, for example, 50 μm. The transport film 4 is provided with the adhesive layer 3 releasable. The thickness T2 of the transport film 4 is preferably about 20 to 200 [mu] m in order to secure the strength and flexibility of the continuous film 1.

The cover film 6 is made of a transparent resin material such as polyethylene terephthalate (PET).
It is formed to have a thickness T3 of .mu.m and is provided releasably via the adhesive layer 5. Here, the total thickness of the hologram film 2, the adhesive layer 5, and the cover film 6 is preferably about 10 to 100 μm in order to make it easy to make a cut with a roll-shaped blade 21C described later.

On the other hand, the pressure-sensitive adhesive layer 3 has a thickness T4 of 10 μm.
The transport film 4 is bonded to the hologram film 2 so that one side surface 2A of the hologram film 2 becomes an interface when the film is peeled off. At this time, the adhesion between the transport film 4 and the hologram film 2 was 10 to 100 g / 2 in the peel test.
The adhesion is preferably adjusted to about 5 mm, for example, by corona treatment using corona discharge so as to be about 80 g / 25 mm.

Further, the adhesive layer 5 has a thickness T5 of 10 μm, and the cover film 6 is formed so that one side 6A of the cover film 6 becomes an interface when the cover film 6 is peeled off from the hologram film 2. 2 At this time, the adhesive force between the cover film 6 and the hologram film 2 is weaker than the adhesive force between the transport film 4 and the hologram film 2, and for example, is applied to one side surface 6A of the cover film 6 so as to be about 20 g / 25 mm in a peel test. Is coated with a release agent by a release treatment, and the adhesion between the cover film 6 and the hologram film 2 is adjusted.

The adhesive layer 5 is formed by bonding and bonding the hologram film 2 onto a glass plate 34 to be described later, for example, by irradiating ultraviolet rays or the like, to develop an adhesive force. Until the cover film 6 and the hologram film 2 are attached to each other, the cover film 6 and the hologram film 2 exhibit adhesive strength so that they can be peeled off.

Reference numeral 11 denotes a hologram film sticking apparatus used in the embodiment. The hologram film sticking apparatus 11 includes a transfer mechanism 12, a cutting mechanism 13, and a peeling mechanism 1.
4. It is composed of an attaching mechanism 15 and the like.

First, the transfer mechanism 12 includes a delivery roller 16, a take-up roller 17, pinch rollers 18, 19 and the like. Here, the feeding roller 16 winds the continuous film 1 in a roll state, and the winding roller 17 is rotationally driven by a driving source (not shown) such as a torque motor. The take-up roller 17 takes up the transport film 4 of the continuous film 1 and transfers the continuous film 1 to a glass plate 34 described later.

Here, the pinch roller 18 is the delivery roller 1
6 and a cutting mechanism 13 and a pinch roller 19
Is provided between the attaching mechanism 15 and the winding roller 17. The pinch rollers 18 and 19 restrict the supply amount of the continuous film 1 to the glass plate 34 side, apply a constant tensile force to the transport film 4, and apply the later-described sticking roller 31 and the glass plate 34. The slack is prevented from being generated in the transport film 4 located between them. The delivery roller 16 and the pinch roller 18 realize a delivery process described below, and the winding roller 17 and the pinch roller 19 implement a winding process described later.

Further, the continuous film 1 is transported toward a glass plate 34 described later, including the delivery roller 16, the pinch roller 18, the take-up roller 17, the pinch roller 19, and a number of idle rollers interposed therebetween. To realize the transfer process.

Next, the cutting mechanism 13 is provided between the delivery roller 16 and the take-up roller 17 and includes a support roller 20 and a cutting roller 21. Supporting roller 2
In the continuous film 1, a frame-like cut is made at a position surrounding the hologram recording section 7 of the hologram film 2, sandwiched between the cutting roller 21 and the cutting roller 21.

In this case, the cut of the hologram recording section 7 may be made to coincide with the boundary of the hologram recording section 7, or the cut may be made in anticipation of a cut margin of a predetermined size around the hologram recording section 7. If the central portion of the hologram recording section 7 is useful and its peripheral edge is unnecessary, a cut can be made in the peripheral edge of the hologram recording section 7.

Here, the cutting roller 21 is provided with flanges 21A, 21A having a diameter of 100 mm provided at both ends and each flange 21A.
A roller section 21B having a diameter of 90 mm that connects the sections A is provided. The roller section 21B is provided with a substantially rectangular frame-shaped roll-shaped blade 21C that is formed in a roll shape.

The cutting roller 21 is used for the continuous film 1.
And the roll-shaped blade 2
1C, a cut is made in the cover film 6 and a portion surrounding the hologram recording portion 7 of the hologram film 2 or a peripheral portion of the hologram recording portion 7, and the roll-shaped blade 21 is cut.
The tooth tip of C reaches the transport film 4, and the transport film 4 is also cut into a depth dimension δ of about 5 μm (see FIG. 2).

At this time, the hologram film 2 is cut by a roll-shaped blade 21C so that the hologram film 2 becomes a substantially square frame-shaped hologram film 2.
2 and a ladder-shaped hologram film 23 as the remaining hologram film. The cover film 6 is also cut into a substantially square frame-shaped cover film 24 and a ladder-shaped cover film 25 by making a cut with the roll-shaped blade 21C.

Further, the peeling mechanism 14 is provided between the cutting mechanism 13 and the attaching mechanism 15 and includes a winding roller 26, a peeling roller 27, an adhesive roller 28, a scraping roller 29 and the like. Then, the peeling mechanism 14 is mounted on the peeling roller 27.
Peels the ladder-shaped hologram film 23 and the ladder-shaped cover film 25 from the transport film 4 and peels the frame-shaped cover film 24 from the frame-shaped hologram film 22 with the adhesive roller 28 and the scraping roller 29. Thereby, the frame-shaped hologram film 2 is placed on the transport film 4.
Only 2 is exposed like an island.

Here, a peeling bar (not shown) is provided on the peeling roller 27, and the peeling bar is inserted between the transport film 4 and the ladder-shaped hologram film 23 by inserting the peeling bar between the transport film 4 and the ladder-shaped hologram film 23. 23 and the like are peeled off. Then, the peeling roller 27 transfers the ladder-shaped hologram film 23 and the ladder-shaped cover film 25 in the direction of arrow A, and moves the transport film 4, the frame-shaped hologram film 22, and the frame-shaped cover film 24 in the direction of arrow B. Transfer to

Further, the ladder-shaped hologram film 23 and the ladder-shaped cover film 25 peeled off from the transport film 4
Means the take-up roller 2 disposed below the peeling roller 27
It is wound up at 6. At this time, the take-up roller 26 slightly pulls and adjusts the ladder-shaped hologram film 23 and the ladder-shaped cover film 25 with respect to the transport film 4, and the ladder-shaped hologram film 23 and the ladder-shaped cover film 2
5 prevents slack from occurring.

Further, the transport film 4 from which the ladder-shaped hologram film 23 and the like have been peeled off by the peeling roller 27, a frame-shaped hologram film 22 formed in a frame shape on the transport film 4, and a frame-shaped cover on the frame-shaped hologram film 22 The film 24 is transported to the adhesive roller 28. At this time, a static eliminator (not shown) is provided between the peeling roller 27 and the adhesive roller 28, and removes electricity from the transport film 4 from which the ladder-shaped hologram film 23 and the like have been peeled off. , Lint and the like are prevented from adhering.

Then, of the transport film 4 and the like transported to the adhesive roller 28, the frame-shaped cover film 24 adheres to the adhesive roller 28 and is separated from the frame-shaped hologram film 22. Then, the frame-shaped cover film 24 attached to the adhesive roller 28 is peeled off from the adhesive roller 28 by the scraping roller 29, and is discharged toward the discharge box 30 arranged below the scraping roller 29.

Further, a static eliminator (not shown) is provided between the adhesive roller 28 and a sticking roller 31 to be described later, and the frame-shaped hologram film 22 from which the frame-shaped cover film 24 has been peeled is neutralized. It prevents dust, foreign matter, lint-like lint and the like from adhering to the hologram film 22.

Next, the sticking mechanism 15 is provided between the peeling mechanism 14 and the take-up roller 17 and includes a sticking roller 31 and an air cylinder 32 for supporting the sticking roller 31. Then, the attaching mechanism 15 attaches the frame-shaped hologram film 22 exposed on the transport film 4 to the glass plate 34 on the mounting table 33.

Here, the attaching roller 31 has a rubber hardness of 70.
Is formed in a cylindrical shape having a diameter of 100 mm from, for example, natural rubber or the like, and is disposed above the glass plate 34 as a plate-like member via the transport film 4. Also, the attaching roller 3
Numeral 1 is provided at the tip of a rod 32A of the air cylinder 32. When the air cylinder 32 swings in the direction of arrow C, the frame-shaped hologram film 22 on the transport film 4 is pressed against the glass plate 34, and the frame-shaped hologram is formed. Film 22
Is peeled off from the transport film 4, and the frame-shaped hologram film 22 is attached to the glass plate 34.

At this time, the air cylinder 32 presses the frame-shaped hologram film 22 while applying a constant pressing force to the glass plate 34 to prevent the frame-shaped hologram film 22 from being wrinkled. The frame-shaped hologram film 22 adhered to the glass plate 34 is irradiated with ultraviolet rays by an ultraviolet lamp (not shown) to cure the adhesive of the adhesive layer 5 for bonding the frame-shaped hologram film 22 to the glass plate 34. At the same time, the adhesion between the frame-shaped hologram film 22 and the glass plate 34 is increased.

The glass plate 34 is formed in a curved shape with a thickness of, for example, 2 mm for use as a windshield of an automobile, and is mounted on a mounting table 33 that supports the outer peripheral side of the glass plate 34.

The apparatus for attaching a hologram according to the present embodiment is configured as described above. Next, the operation when the hologram is attached to a glass plate using the apparatus for attaching a hologram having the above configuration will be described with reference to FIG. This will be described with reference to FIG.

First, in the delivery step, the take-up roller 17 is driven to rotate, and the continuous film 1 wound in a roll state on the delivery roller 16 is fed to the cutting step while the supply amount is restricted by the pinch rollers 18 and 19. Sent out.

Next, in the cutting step, the continuous film 1 is cut from the cover film 6 to the hologram film 2 by the roll-shaped blade 21C of the cutting roller 21. As a result, the hologram film 2 becomes a substantially rectangular frame-shaped hologram film 2 having a final attachment shape.
2 and the remaining ladder-shaped hologram film 23. The cover film 6 is also cut into a substantially square frame-shaped cover film 24 and a remaining ladder-shaped cover film 25. Thereby, the cut continuous film 1 is transferred to the peeling step.

In the peeling step, the ladder-shaped hologram film 23 and the ladder-shaped cover film 25 are peeled from the transport film 4 by the peel roller 27, and the frame formed on the transport film 4 by the adhesive roller 28 is formed. The frame-shaped cover film 24 is peeled from the hologram film 22. As a result, only the frame-shaped hologram film 22 is exposed on the transport film 4 so as to project into an island shape, and is sent to the next sticking step.

In the sticking step, the frame-shaped hologram film 22 exposed on the transfer film 4 is transferred to the upper side of the glass plate 34 and the frame-shaped hologram film 22 is moved to the position where the glass plate 34 is stuck. Then, the take-up roller 17 and the like are stopped, and the frame-shaped hologram film 22 is stopped above the glass plate 34. At this time, a fixed tensile force is applied to the transport film 4 by the pinch rollers 18 and 19 so that the transport film 4 does not become loose.

Then, the frame-shaped hologram film 22 is attached to the glass plate 3 from the upper side of the transport film 4 by the attaching roller 31.
4, the glass plate 34 and the frame-shaped hologram film 2
The frame-shaped hologram film 22 is adhered to the glass plate 34 so that air does not remain between the frame-shaped hologram film 22 and the adhesive of the adhesive layer 5 is cured by irradiating the frame-shaped hologram film 22 with ultraviolet rays. And the glass plate 34 to increase the adhesion. The ultraviolet irradiation can be performed after the glass plate 34 is transported to the next stage.

Finally, in the winding step, the winding roller 1
The transport film 4 is peeled off from the frame-shaped hologram film 22 adhered to the glass plate 34 by rotating the 7 and the like again and winding the transport film 4 by the winding roller 17. On the other hand, the glass plate 34 on which the frame-shaped hologram film 22 is pasted is transported to the next stage, and another glass plate is placed on the stage of the pasting process, thereby continuously attaching the hologram to the glass plate. Can be realized.

Thus, according to the present embodiment, since the continuous film 1 is transported toward the glass plate 34 by the transport mechanism 12 including the sending roller 16 and the like, the frame-shaped hologram film 22 of the continuous film 1 is Board 34
Can be attached continuously.

Further, by making a cut into the continuous film 1 by a cutting mechanism 13 including a cutting roller 21 and the like, the hologram film 2 is formed into a frame-shaped hologram film 22 having a final affixed shape and the remaining ladder-shaped hologram. The film 23 can be separated from the film 23, and there is no need to perform trimming for forming the frame-shaped hologram film 22 after the hologram film 2 is attached to the glass plate 34, so that productivity can be greatly improved.

Further, the frame-shaped hologram film 22 is formed by separating the cover film 6 and the ladder-shaped hologram film 23 from the transport film 4 by providing a separation mechanism 14 including a separation roller 27 and the like.
The adhesive surface of the frame-shaped hologram film 22 can be covered with the frame-shaped cover film 24 before being attached to the frame 4, and dust and the like can be reliably prevented from adhering to the frame-shaped hologram film 22.

Further, by forming the attaching mechanism 15 with an attaching roller 31 for pressing the frame-shaped hologram film 22 against the glass plate 34 from the upper side of the transporting film 4, the transporting film 4 can be provided with a constant tensile force. Hologram film 22 can be stuck to glass plate 34, wrinkles and the like can be prevented from being generated in frame hologram film 22, and frame hologram film 22 can be stuck securely to curved glass plate 34. The bonding state of the frame-shaped hologram film 22 for each glass plate 34 can be made substantially uniform.

Further, the roll-shaped blade 21 of the cutting roller 21
C has a configuration in which a cut is made in both the transport film 4 and a part of the thickness direction, so that when the hologram film 2 is peeled off by the peeling mechanism 14 in a state where a frame-shaped cut is made, the frame-shaped hologram film 22 And the ladder-shaped hologram film 23 can be reliably separated.

Further, by providing the hologram film 2 with the hologram recording portions 7 at predetermined intervals in the length direction, the frame-shaped hologram film 22 can be reliably cut out by the cutting mechanism 13, The frame-shaped hologram film 22 can be continuously attached to the glass plate 34.

In the above embodiment, the case where the frame-shaped hologram film 22 is attached to the glass plate 34 as a plate-shaped member has been described as an example. However, the present invention is not limited to this.
A transparent plastic plate such as an acrylic resin may be used as the plate member.

In the above embodiment, a peeling bar is inserted between the transport film 4 and the ladder-shaped hologram film 23 so that the ladder-shaped hologram film 23 is removed from the transport film 4.
However, the winding roller 26 may be rotated at a slightly higher speed than the transfer film 4 to separate the ladder-like hologram film 23 and the ladder-like cover film 25 from the transfer film 4. .

Further, in the above-described embodiment, the case where the hologram film 2 is attached to one glass plate 34 has been described as an example. However, the glass plates placed on a plurality of placing tables are sequentially placed on a chain conveyor or the like. It may be configured to be arranged below the attaching roller 31. In addition, the attaching mechanism 15 is not limited to the attaching roller 31, and a method similar to pad printing in which the frame-shaped hologram film 22 is pressed from the center to the outer peripheral side may be used.

[0054]

As described above in detail, according to the present invention, a continuous film in which a carrier film and a cover film are releasably bonded to both sides of a hologram film is transferred to a plate-like member in the process of being transferred to a plate-like member. A cut was made, the cover film and the remaining hologram film were peeled off from the carrier film, and the frame-shaped hologram film on the carrier film was attached to the plate-shaped member. The hologram film can be continuously adhered to the hologram film, and the bonding state of the frame-shaped hologram film can be made substantially uniform, and the productivity can be greatly improved.

In the cutting step, a cut is made also in a part of the thickness of the transport film, so that when the hologram film is peeled off by the peeling step with the frame-shaped cut, the frame-shaped hologram film and the residual Can be reliably separated from the hologram film.

Further, by providing a hologram recording section at predetermined intervals in the length direction on the hologram film,
The frame-shaped hologram film can be reliably cut out by the cutting means, and the frame-shaped hologram film can be continuously stuck to the plate-shaped member by the sticking mechanism.

[Brief description of the drawings]

FIG. 1 is a partially broken perspective view showing a continuous film used in an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of the continuous film used in the embodiment of the present invention, as viewed from the direction of arrows II-II in FIG.

FIG. 3 is an overall configuration diagram of a method of attaching a hologram film according to an embodiment of the present invention.

FIG. 4 is a perspective view showing a cutting mechanism in FIG. 3;

FIG. 5 is a perspective view showing a peeling mechanism in FIG. 3;

FIG. 6 is a perspective view showing an attaching mechanism and a glass plate in FIG. 3;

[Explanation of symbols]

 Reference Signs List 1 continuous film 2 hologram film 4 transport film 6 cover film 7 hologram recording unit 11 hologram film sticking device 12 transfer mechanism 13 cutting mechanism 14 peeling mechanism 15 sticking mechanism 22 frame-shaped hologram film 23 ladder-shaped hologram film 34 glass plate (plate-shaped) Element)

Claims (3)

[Claims] 1. A transfer step of transferring a continuous film, in which a transport film and a cover film are respectively releasably bonded to both sides of a hologram film, toward a plate-like member to which a hologram is to be attached, In the continuous film sent in the process, at least a cover film and a portion including a hologram recording portion where a predetermined interference fringe of the hologram film is recorded or a peripheral portion of the hologram recording portion by making a frame-shaped cut. A cutting step of forming a frame-shaped hologram film, excluding a frame-shaped hologram film formed by the cutting step and a transfer film, and a separation step of separating the cover film and the remaining hologram film from the transfer film; Attach the frame-shaped hologram film on the transport film to the plate-like member A hologram film including a bonding step. 2. The hologram film sticking method according to claim 1, wherein in the cutting step, a frame-shaped cut is also made in a part of the transport film in a thickness direction. 3. A frame-shaped hologram film is formed in a portion including a hologram recording portion and a ladder-shaped hologram film is formed in other portions by making a frame-shaped notch in the cutting step. 3. The method according to claim 1, wherein the cover film on the frame-shaped hologram film is separated from the frame-shaped hologram film after the hologram film and the cover film on the ladder-shaped hologram film are separated.