JP3428552B2 - Film sticking apparatus and film sticking method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film sticking device and a film sticking method for sticking a film on a panel surface of a display device such as a cathode ray tube.

[0002]

2. Description of the Related Art Generally, in a large-sized display device such as a cathode ray tube or a plasma display, external light or illumination light may be reflected on the screen to make it difficult to see an image. Therefore, an antireflection film is often provided on the panel surface. In addition, in consideration of the influence of the electromagnetic waves emitted from the display device on the human body, an electromagnetic wave prevention film, and further, a multifunctional film for the purpose of preventing static electricity or preventing explosion may be attached to the panel surface.

Conventionally, this kind of multifunctional film (hereinafter referred to as a film) has been attached to a cathode ray tube by an attaching roller as shown in FIG. FIG. 4 shows a film 3
Shows the state in the middle of the step of sticking to the panel surface 2 of the cathode ray tube 1. The figure (A) is a side view in the plane orthogonal to the axis of the sticking roller, and the figure (B) is the same of the sticking roller. The side view in the surface parallel to an axis is shown. The sticking roller 4 is composed of a shaft portion 4a and a pressing portion 4b supported by the shaft portion 4a. The shaft portion 4a is made of iron, and the pressing portion 4b is made of hard rubber having a hardness of about 70 °. Each is formed.

When the sticking roller 4 is used for sticking, one end of the film 3 is attached to one end of the panel surface 2 and both ends of the shaft portion 4a are rotatably supported, and the pressing portion is pressed. 4b is moved on the film 3 while rolling from one end side to the other end side. As a result, the film 3 is pressed and attached to the entire surface 2 of the panel.

[0005]

However, in the pasting roller 4 of the related art, both the shaft portion 4a and the pressing portion 4b have high hardness and are hard to be deformed, so that the following problems occur. That is, the pasting roller 4 of the related art is not flexible enough to be curved in accordance with the curved surface shape of the panel surface 2. Therefore, when the panel surface 2 has a curved surface, such as a panel with a radius, it follows the curved surface shape. Cannot be fully adhered. In particular, at the panel end having a large curvature, the gap between the pressing portion 4b of the sticking roller 4 and the panel surface 2 becomes large. Therefore, in the panel end portion, air bubbles are trapped between the panel surface 2 and the portion of the film 3 which is not pressure-bonded by the attaching roller 4, and there is a problem that the film 3 cannot be attached cleanly.

Further, the panel surface 2 of the cathode ray tube 1 usually has irregularities due to vacuum deformation or the like during the panel assembling process. The shape of the unevenness depends on the manufacturing lot of the cathode ray tube 1. Conventionally, in order to uniformly attach the film 3 to the panel surface 2 having such unevenness, the application roller 4 is fitted in accordance with the average uneven shape of the panel surface 2.
The outer diameter of the sticking roller 4 is changed in the axial direction, or the sticking roller 4 is locally weighted.

However, even in these methods, since the material of the sticking roller 4 is hard as described above, the panel surface 2
As shown in the enlarged view of FIG. 5, there was a portion where the pasting roller 4 did not hit. In this way, in the concave portion 5 where the sticking pressure is insufficient, the film 3 is not pressed against the panel surface 2 and air is still trapped, which hinders the improvement of the quality and productivity of the cathode ray tube 1. .

The present invention has been made in view of the above problems, and an object thereof is to attach a film evenly to a panel surface having irregularities or having a large curvature at the end. An object is to provide a bonding device and a film bonding method.

[0009]

A film sticking apparatus according to the present invention sticks a film on a panel surface of a display device by rolling a sticking roller with the film interposed therebetween. The sticking roller is
A cylindrical pressing part with flexibility that can follow the uneven shape of the panel surface, and support this pressing part, and follow the shape of the panel surface.
It is configured to include a deformable shank and both ends of the shank
While supporting rotatably, pressurizing both ends of the shaft,
By bending the whole of the panel according to the curvature of the panel surface.
Therefore, the pressing portion is brought into close contact with the panel surface.

The film sticking method according to the present invention is
A sticking roller formed by supporting a cylindrical pressing portion having flexibility capable of following the uneven shape of the panel surface of the display device by the shaft portion is rotatably supported at both ends of the shaft portion.
Apply pressure to both ends and move the entire shaft according to the curvature of the panel surface.
By bending it, the pressing part
The film is attached to the panel surface by bringing it into close contact with the flannel surface and rolling the pressing portion .

In the film sticking apparatus and method according to the present invention, the pressing portion moves while rolling on the film in accordance with the movement of the shaft portion of the sticking roller, whereby the film is pressed and stuck to the panel surface. At this time , paste
The rollers are rotatably supported at both ends of the shaft.
As a result, if pressure is applied to both ends of the shaft, the entire shaft will be paneled.
The curved surface is curved according to the curvature of the
Let Since the pressing portion is flexible, even if there are irregularities or end portions having a large curvature on the panel surface, they closely adhere to and follow these, and the film is evenly attached.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a schematic structure of a film sticking apparatus 20 according to an embodiment of the present invention. The film sticking device 20 sticks a film 13 onto a panel surface 12 of a display device, for example, a cathode ray tube 11, and includes a sticking roller 14. FIG. 2 is a diagram for explaining the operation of the sticking roller 14.

The cathode ray tube 11 is fixedly supported on a mount 21 with the panel surface 12 facing upward. Although not shown, the gantry 21 is provided with an adjusting mechanism. With this adjusting mechanism, the height of the sticking roller 14 can be adjusted, and at the same time, the distance between the sticking roller 14 and the panel surface 12 can be adjusted appropriately. There is. The pedestal 21
Is provided separately from the film sticking device 20, and is installed at a predetermined position of the film sticking device 20.

The sticking roller 14 has a shaft 1
4a and pressing portion 14b supported by the shaft portion 14a
It is composed of and. Both ends of the shaft portion 14a are pressure portions 15, and the pressure portions 15 are rotatably supported by, for example, a movable frame of a moving mechanism (not shown). The pressing portion 14b is rotatable together with the shaft portion 14a and rolls in the direction of arrow I in FIG. 1 while pressing the film 13 against the panel surface 12 of the cathode ray tube 11 and moves on the panel surface 12 from one end to the other end. It is like this.

The sticking roller 14 of the present embodiment is adapted to move while following the uneven shape of the panel surface 12 of the cathode ray tube 11 which is fixed and supported. That is, each of the shaft portion 14a and the pressing portion 14b is formed of a flexible material, and as shown in FIG. 2, the sticking roller 14 is brought into close contact with the panel surface 12 regardless of the panel shape. Is able to.

As the material of the shaft portion 14a, for example, SU
Examples thereof include S (stainless steel), vinyl chloride and vinyl resin. In particular, vinyl chloride or vinyl resin having high flexibility is suitable for a panel having a large curvature. The shaft portion 14a is formed in a cylindrical shape, for example, and is
When US is used, for example, the outer diameter is 25 mm and the wall thickness is 0.5 to 1.0 mm. When vinyl chloride or vinyl resin is used, it is desirable that the outer diameter is around 25 mm and the wall thickness is within the range of 3.0 to 4.0 mm. In addition, the length of the shaft portion 4a is about the width of the panel surface (width in the left-right direction in FIG. 2) of the conventional one, but in the present embodiment, it is along the panel surface 12. It is desirable to make it longer than the width of the panel surface since it is used after being bent.

The material of the pressing portion 14b has a hardness of 20.
It is preferably from 0 to 25 °, and specifically, ethylene, propylene, polymers thereof, PET (poly (e
thylene terephthalate)) and the like. Other compounds can also be used as long as they exhibit rubber-like elasticity. The pressing portion 14b has a cylindrical shape in which the shaft portion 14a is housed in the central portion, and is formed to have an outer diameter of 70 mm and an inner diameter of about 27 mm, for example. In the present embodiment, the inner diameter of the pressing portion 14b is set to be larger than the outer diameter of the shaft portion 14a, and the pressing portion 14b and the shaft portion 14a are not completely fixed and can be easily separated. It has become. Of course, the pressing portion 14b and the shaft portion 14a may be completely fixed.

By the way, in the conventional film sticking apparatus, a commercially available rubber roller is used as a sticking roller. This rubber roller has a shaft portion and a pressing portion which are integrated, the materials are almost the same, and the size is predetermined. In other words, the pasting roller had to be arranged for each tube type of the cathode ray tube from the existing specifications. By the way, commercially available products are expensive, and if the rollers are arranged in the same number as the number of pipe types, the cost is further increased. On the contrary,
In the present embodiment, since the shaft portion 14a and the pressing portion 14b can be removed, the attaching roller 14 can be adapted to the tube type by appropriately combining these materials and sizes. That is, by arranging the minimum number of the shaft portion 14a and the pressing portion 14b, it is possible to cope with multiple pipe types, and to realize the sticking roller 14 that is more suitable for each pipe type than the commercially available product. Further, each of the shaft portion 14a and the pressing portion 14b is inexpensive, and the cost of the attaching roller 14 as a whole can be significantly reduced.

Next, the operation of the film sticking device 20 thus constructed will be described.

For example, when the panel surface 12 is a curved surface, as shown in FIGS. 1 and 2, the sticking roller 14 is formed by selecting and combining the shaft portion 14a and the pressing portion 14b capable of following the curved surface. Is attached to a moving mechanism (not shown). Then, the film 1 is attached to one end of the panel surface 12 of the cathode ray tube 11 fixed to the pedestal 21.
After one end of 3 is brought into contact with each other for alignment, the sticking roller 14 is pressed onto the end of the film 13 to press the film 13 onto one end of the panel surface 12. As a pressing force against the film 13, the sticking roller 14 is applied with a load of 5 kg, for example, on the pressing portions 15 at both ends of the shaft portion 14a. Due to this pressing force, the sticking roller 1
Although the shaft portion 14a of No. 4 and the pressing portion 14b are not fixed to each other, the pressing portion 14b is not displaced during the operation.

In FIG. 1, the other end of the film 13 is an unattached portion and is separated from the panel surface 12. In this state, the sticking roller 14 rolls from one end of the panel surface 12 toward the other end while pressing the film 13 against the panel surface 12. As a result, the film 13 is sequentially attached to the panel surface 12.

As described above, according to the present embodiment, the sticking roller 14 of the film sticking apparatus 20 is flexible enough to follow the panel surface 12, so that the entire surface of the film 13 is sufficiently covered on the panel surface 12. The air can be prevented from being trapped even in the cathode ray tube 1 having a curved surface on the panel surface 12, and the film can be evenly attached.

Further, by sticking the film in this way, as shown in the enlarged view of FIG. 3, even when the panel surface 12 has irregularities, the pressure applied to the pressurizing portion 15 causes the axial portion to move. 14a and the pressing portion 14b follow the panel surface 12, and the pressing portion 14b is particularly
It can be deformed according to the shape of and can be sufficiently pressed to the concave portion 16. Moreover, since the film sticking device 20 uses the sticking roller 14 having the flexibility capable of following the panel surface 12 as described above, air entrapment is eliminated regardless of the position of the unevenness of the panel surface 12. be able to. Incidentally, it was necessary to grasp the irregularities on the panel surface in advance before attaching the film by the conventional method of locally applying pressure to the irregularities. Then, the sticking roller is replaced or the unevenness of the panel surface is grasped for each manufacturing lot having the same unevenness, and the film sticking apparatus is set accordingly. On the other hand, in the present embodiment, such labor is not required at all, and the sticking operation can be continuously performed regardless of the manufacturing lot, and the productivity can be improved.

The present invention has been described above with reference to the embodiments, but the present invention is not limited to the above embodiments, and various modifications can be made. For example, in the above embodiment,
In the pasting roller 14, an example in which both the shaft portion 14a and the pressing portion 14b have flexibility capable of following the unevenness of the panel surface has been described, but only the pressing portion 14b may have such flexibility. . Further, in the above embodiment, an example in which the film is attached to the panel surface of the cathode ray tube has been described, but it goes without saying that it may be attached to other display devices such as a plasma display.

As described above, according to the film sticking apparatus or method of the present invention, the concave surface of the panel surface of the display device is used.
A cylindrical pressing part with flexibility that can follow the convex shape
Supported by a shaft that can be deformed according to the shape of the flannel surface
Support the sticking roller so that it can rotate at both ends of the shaft.
Hold it and apply pressure to both ends of the shaft,
The pressing part is filmed by bending according to the curvature.
Since it is arranged so as to be in close contact with the panel surface with the gap therebetween , the film can be evenly attached even to a panel surface having irregularities or having a large end curvature. Furthermore,
Since this sticking roller has a simple structure and the sticking roller is inexpensive, the sticking roller can be inexpensively constructed as a whole. Furthermore, by constructing the shaft portion and the pressing portion of the sticking roller so as to be detachable and separable, it is not necessary to replace the sticking roller for each production lot.
Film sticking work can be performed with a single film sticking device for multiple pipe types, and productivity is improved.

[Brief description of drawings]

FIG. 1 is a side view for explaining the configuration of a film sticking device according to an embodiment of the present invention.

FIG. 2 is a view for explaining the action of a sticking roller in the film sticking device shown in FIG.

FIG. 3 is an I-I in the film sticking apparatus shown in FIG.
It is a fragmentary sectional view along a line.

FIG. 4 is a side view (A) taken along a plane perpendicular to the axis of the pasting roller and a side view (B) taken along a plane parallel to the axis of the pasting roller of the conventional film pasting apparatus.

FIG. 5 is an explanatory diagram showing a state of occurrence of air entrapment in a conventional sticking roller.

[Explanation of symbols]

11 ... Cathode ray tube, 12 ... Panel surface, 13 ... Film,
14 ... Sticking roller, 14a ... Shaft part, 14b ... Pressing part,
15 ... Pressing part, 20 ... Film sticking device, 21 ... Frame

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B29C 63/00-63/48 B29C 65/00-65/82

Claims (4)

(57) [Claims] 1. A film sticking device for sticking a film on the panel surface of a display device by rolling a sticking roller with a film interposed between the film and the sticking roller, Includes a cylindrical pressing portion having flexibility capable of following uneven shapes, and a shaft portion that supports the pressing portion and is deformable according to the shape of the panel surface, and allows both ends of the shaft portion to rotate. While supporting and applying pressure to both ends of the shaft part, the entire shaft part is attached to the panel.
By bending according to the curvature of the surface, the pressing portion
A film sticking device that is attached to the panel surface . 2. The shaft portion is vinyl chloride or vinyl resin.
Film sticking of claim 1, wherein in that it consists
apparatus. 3. The film sticking apparatus according to claim 1, wherein the pressing portion is removable from the shaft portion. 4. A panel pressing surface is provided with a cylindrical pressing portion having flexibility capable of following the uneven shape of the panel surface of the display device.
A sticking roller, which is supported by an axially deformable shaft portion, is rotatably supported at both ends of the shaft portion, and pressure is applied to both ends of the shaft portion so that the entire shaft portion is covered by the panel.
The pressing portion by curving according to the curvature of the curved surface.
To the panel surface with a film in between,
A film sticking method, wherein a pressure part is rolled to stick a film to the panel surface.