JPH1039416A - Spreading and supporting jig for films and sheets - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spreading and supplying jig capable of spreading and supporting films and sheets without the occurrence of wrinkles and slacks. SOLUTION: This jig places the films and sheets 110 made of synthetic resins having no self-standing property along one surface of a plate 130 having the self-standing property, sticks the films and sheets at both end flanks in the spreading direction of the plate having the self-standing property and fits the plate having the self-standing property to a square frame 120 with the films and sheets in-between, thereby spreading and supporting the films and sheets to the frame. The plate 130 having the self-standing property is provided with round projecting parts 135 at both ends in the spreading direction on the surface side where the films and sheets are spread. The plate is also provided with angle parts 121 which can fit the films and sheets by eliminating the clearances while force spreading the films and sheets at the time of fitting the plate to the frame 120 with the films and sheets in-between on the side of the frame where the frame comes into contact with the films and sheets.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig for extending and supporting a non-self-supporting film or sheet on a frame along a self-supporting lens sheet, and more particularly to a jig for a projection screen such as a television. The present invention relates to a jig for extending and supporting a film or sheet.

[0002]

2. Description of the Related Art Fresnel lenses for projection screens of televisions and the like have conventionally been composed mainly of circular Fresnel lenses formed of concentric lenses using a self-supporting relatively thick sheet and formed by hot pressing. And a mold using a UV-curable resin. In recent years, lenses with thin lenses formed on thin films have been manufactured due to the demand for thinner lens sheets to reduce deterioration in image quality due to lens optical loss and the like and continuous production to improve productivity. It has become. For example, a linear Fresnel lens formed by arranging lenses in parallel in a straight line has a linear shape.To manufacture it, a machine using a gravure printing machine applies ultraviolet light on a continuous thin film. A method such as an ultraviolet curing method of forming a linear Fresnel lens by transferring a curable resin into a predetermined shape and curing it with ultraviolet light has been employed. As a stretching support method when using a thin and poorly self-supporting film lens produced as described above as a projection screen, a first method of tying a rigid plate, for example, a lenticular lens sheet, the film itself is used as a frame. The second method of stretching while supporting on a support such as a body or a cabinet is known,
The second method is superior in terms of productivity in consideration of the probability of occurrence of wrinkles and looseness and further thinning. However, in the case of the second method in which the film itself is stretched while being supported by a support such as a frame or a cabinet, it is difficult to securely fix the film, and tension is applied without causing wrinkles on the film. It was difficult to keep going and it took a lot of fixing. That is, in the second method, it is required that the lens film is always kept under tension and that the entire lens film can be easily held without wrinkling or loosening. Was.

[0003]

As described above, for a thin linear Fresnel lens film having no self-sustainability which is continuously produced for a projection screen, the film itself is supported on a support such as a frame or a cabinet. It can be securely fixed during stretching, can keep tension (tension) without causing wrinkles and loosening of the film, and is simple and does not require tips for fixing , A support jig was required. The present invention
Under such circumstances, the film and the sheets for the projection screen have a relatively simple structure, and can be securely fixed without causing wrinkles or loosening of the films and the sheets. It is an object of the present invention to provide a stretching support jig which can continuously apply tension.

[0004]

SUMMARY OF THE INVENTION The film and sheet stretching support jig of the present invention is a method of making a self-supporting synthetic resin film or sheet along one surface of a self-supporting plate.
By attaching the self-supporting plate to both sides in the extending direction of the self-supporting plate, and fitting the self-supporting plate to a rectangular frame with the film and sheets interposed therebetween, the film and the sheet A jig for extending and supporting the kind on the frame body, the plate having the self-supporting property, R-shaped convex portions are provided at both ends in the extending direction on the side on which the film and sheets are extended, At the periphery of the plate including the R-shaped convex portion and the side surface of the plate, the film and the sheets are fitted to the frame via the sheets. When affixed, a gap is formed between the film and the sheet from the R-shaped projections at both ends of the self-supporting plate to the side of the plate, and the gap is formed between the frame and the sheet in contact with the film or sheet. When fitting a plate to a frame with a film or sheet in between, Lum, while extending down the sheets eliminate the gap, is characterized in that is provided with a corner can be fitted. The film or sheet in the above is a film or sheet for a projection screen, the self-supporting plate is a lens sheet having a lens disposed on at least one surface, and the film or sheet is disposed on the lens surface side. The self-supporting sheet is attached at both end sides in the direction in which the film sheet is stretched, and the height of the R-shaped convex portion of the lens sheet is determined by the lens surface. Is higher than the height. The corners described above are characterized in that they have elasticity for adjusting the expanding force (extension tension). Also, in the above, one set of opposed two
The film and sheets are stretched and supported at the sides. The above-mentioned attachment of a film or sheet to a self-supporting plate is characterized by being fixed by a heat sealing method or an ultrasonic fusion method. Here, the film or sheet for a projection screen includes both a film having a lens formed on its surface and a film not having a lens. The R-shaped protrusion has a circular arc-shaped protrusion facing the outside, and is formed on the lens forming surface side of the lens sheet.

[0005]

The film and sheet stretching support jig of the present invention has a relatively simple structure for films and sheets, and has a wrinkle for films and sheets. It is possible to provide a stretching member that can be securely fixed without causing any looseness and can continue to apply tension. More specifically, the film and sheet stretching support jig of the present invention is a self-supporting plate, in which R-shaped convex portions are provided at both ends in the stretching direction on the surface on which the film and sheet are stretched. A film and a sheet are fitted to a frame at a peripheral portion of the plate including the R-shaped convex portion and the side surface portion of the plate. When affixed on the side surface, a gap is formed between the film and the sheet from the R-shaped projections at both ends of the plate to the side surface of the plate. When fitting a plate to the body with a film and sheets in between, eliminating the gap while pushing and stretching the film and sheets,
This is achieved by providing corners that can be fitted. Specifically, the film or sheet is a film or sheet for a projection screen, the self-supporting plate is a lens sheet having a lens disposed on at least one surface, and the film or sheet is placed on the lens surface side. In accordance with, the film of a self-supporting plate, by sticking on both side surfaces in the direction in which sheets are stretched, and the height of the R-shaped convex portion of the lens sheet,
By setting the height higher than the height of the lens surface, in the support of the film or sheet for the projection screen, the support can be made effective without being affected by the lens forming surface or the lens shape of the lens sheet. . Since the corners have elasticity for adjusting the expanding force (extension tension), it is possible to cope with environmental changes and the like. In addition, by attaching films and sheets to the sides of a self-supporting plate by a heat sealing method or an ultrasonic fusion method, the film and sheets can be easily attached to the frame. I have. By providing the outer frame with the function of the outer frame, the entire structure can be simplified. Further, the frame can be made rectangular, and the entire structure can be made simple by extending and supporting films and sheets on only one set of two opposing sides.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a film and sheet stretching support jig of the present invention will be described with reference to the drawings. First, a stretching support jig for films and sheets according to the embodiment will be described. FIG. 1 (a)
Is a plan view showing a state after completing the stretching support using the stretching support jig of the film and sheets of the present embodiment,
FIG. 1B is a cross-sectional view taken along line A1-A2 of FIG. 1A, and FIG. 2A is a cross-sectional view of a state where a film is spread on a lens sheet made of a self-supporting plate. 2
(B) is an enlarged view of a B part. 1 and 2, 1
00 is a stretching support jig, 110 is a film, 120 is a frame, 121 is a corner, 122 is an R-shaped recess, 125 is a lens sheet fixing part, 130 is a lens sheet (a self-supporting plate), and 131 is A plate-like sheet, 131S is a side surface, 133
Is a lens part, 135 is an R-shaped convex part, 140 is a gap, 15
Numeral 0 is a heat seal portion. The film and sheet stretching support jig of the present embodiment stretches and supports a non-self-supporting synthetic resin film and sheet along a self-supporting lens sheet so that wrinkles and loosening do not occur. As shown in FIG. 2, a stretching support jig for a projection screen, in which a film 110 is stretched on a lens portion 133 side of a lens sheet 130, such that the film 110 side is in contact with a frame 120, as shown in FIG. By performing the fitting as shown in FIG. In particular, the extension support jig of the present embodiment is a television projection screen made of a film or sheet having no independence,
This is effective when used by extending and supporting a self-supporting lens sheet, but the use is not limited to this.

The extension and support of the film of this embodiment will be briefly described below. As shown in FIG. 2, the end of the film 110 is attached to the side surface 131S of the plate-like sheet 131 of the lens sheet 130 by heat sealing, and both ends of the lens sheet 130 in the direction in which the film 110 extends are: By providing the arc-shaped R-shaped convex portion 135, the film 110 can be used as the lens sheet 13.
0, the gap 140 extends from the R-shaped convex portion 135 to the side surface 131S of the plate sheet 131 of the lens sheet.
However, when the lens sheet 130 having the film 110 shown in FIG. 2 is fitted to the frame 120 with the film 110 interposed therebetween, the lens sheet 130 is pushed by the corner 121 of the frame, The entire film 110 extends and the gap 140
Gradually decreases and almost disappears as shown in FIG. That is, by extending the film 110 so as to eliminate the gap 140, the entire film is expanded. The end of the film is attached by heat sealing on the side surface 131S of the plate-like sheet 131 of the lens sheet 130.
When the “0” is fitted to the frame 120, as shown in FIG. 1B, the ends of the heat seal portion 150 and the film 110 are sandwiched and fixed between the frame 120 and the lens sheet 130. Thus, the film 110 is supported.
The fixing when the film 110 is stretched along the lens sheet 130 can be easily performed by an ultrasonic fusion method or the like other than the heat sealing, but the fixing method is not particularly limited to these.

In the present embodiment, an R-shaped recess 122 having the same shape as the R-shaped protrusion 135 of the lens sheet 130 is fitted in the frame body 120 with the film 110 interposed therebetween without any gap. By providing it, the expansion is more reliable. As the material of the frame 120, polypropylene is used, but depending on the degree of the expanding force, a harder metal material such as polyvinyl chloride or aluminum can also be used.

As a modified example of the frame, an R-shaped recess 122 is provided.
The corners 121 may be configured as shown in FIG. In this case, as shown in FIG.
20 and the film 410 is stretched by the corners 421. Further, the shape shown in FIG. Also in this case, as shown in FIG.
The film 510 is stretched by the corners 521.
The corner 421 shown in FIG. 4 and the corner 521 shown in FIG. 5 are required to be made of a material having an appropriate elasticity that can withstand a force (extension tension) for stretching the film.

In this embodiment, the lens sheet 130 and the film 120 are fitted to each other on one pair of two sides of the substantially rectangular frame 120 so that the direction in which the lens sheet 130 extends can be changed. The direction is one direction, and the extension support is simple. If it is desired to expand more firmly, by fixing all four sides in the same manner as this method, it is possible to expand both left and right and up and down. In addition, since the height of the R-shaped convex portion (R-shaped convex portion) 135 of the lens sheet 130 is higher than the height of the lens surface of the lens portion 133 of the lens sheet 130, the height is not affected by the shape of the lens. .

The operation of the film and sheet stretching support jig 100 of the present embodiment will be described in more detail with reference to FIG. Note that, for simplicity, FIG. 3 shows only a cross section taken along line A3-A4 shown in FIG. First, a lens sheet 130 on which a film 110 is stretched and a frame 120 are prepared, and the frame 120 and the lens sheet 130 are gradually brought closer to each other at a position where the film 110 is fitted with the film 110 interposed therebetween. (FIG. 3A) Next, the inner wall of the side surface of the frame body 120 is
0 is gradually fitted while being applied to the side surface 131S of the plate-shaped sheet 131. (FIG. 3 (b)) As the fitting progresses, the corners 121 come into contact with the film 110, and the film 110 is pushed and the film 1 is pressed.
The gap 140 is gradually narrowed so as to extend the whole 10. (FIG. 3C) At this time, the lens sheet fixing portion 125 of the inner wall on the side surface side of the frame 120 gradually passes through the side surface 131S. And
The lens sheet fixing portion 125 of the frame body 120 has a side surface 131S.
At the same time, the R-shaped concave portion 122 is fitted into the R-shaped convex portion 135 through the film 110 without any gap, and the gap 140 shown in FIGS. 3A to 3C is eliminated.
(FIG. 3 (d)) Further, regarding the fixing, the film 110 is excessively adhered to the heat seal portion 150, so that when the film 110 is fitted, the film 110 is wound around the back side of the lens sheet 130 by the lens sheet fixing portion 125. Fixing is more secure.

[0012]

According to the present invention, as described above, it is possible to provide a film and sheet stretching support jig capable of reliably supporting films and sheets with a simple structure.
In particular, when a thin film or sheet without independence used for a projection screen for television is stretched along with an independent lens sheet, it is possible to provide a simple jig that can reliably support the extension. did.

[Brief description of the drawings]

FIG. 1 is a drawing of a film and sheet stretching jig of an embodiment.

FIG. 2 is a view for explaining a state in which a film is stretched on a lens sheet.

FIG. 3 is a diagram for explaining an operation of extending and supporting films and sheets.

FIG. 4 is a view for explaining a modified example of a frame.

FIG. 5 is a view for explaining a modification of the frame.

[Explanation of symbols]

REFERENCE SIGNS LIST 100 Extension support jig 110 Film 120 Frame 121 Corner 122 R-shaped recess 125 Lens sheet fixing portion 130 Lens sheet (autonomous plate) 131 Plate-shaped sheet 133 Lens portion 135 R-shaped protrusion 140 Gap 150 Heat Sealing portions 410, 510 Film 420, 520 Frames 421, 521 Corner portions 422 Concave portions 425, 525 Lens sheet fixing portions 430, 530 Lens sheets 431, 531 Plate sheets 435, 535 R-shaped convex portions 440, 540 Gap 450, 550 Heat seal part

Claims (6)

[Claims] 1. A self-supporting synthetic resin film or sheet is stuck along one surface of a self-supporting plate on both side surfaces in a direction in which the self-supporting plate extends, and A jig for extending and supporting the film and sheets on the frame by fitting a self-supporting plate to the square frame with the film and sheets interposed therebetween. Some plates are provided with R-shaped protrusions at both ends in the direction in which the film and sheets are spread on the surface side.
The film and sheets are fitted to the frame at the periphery of the plate, including the convex portions and the side surfaces of the plate, via the films and sheets. When attached, a gap is formed between the film and the sheet from the R-shaped protrusions at both ends of the self-supporting plate to the side surface of the plate, and a frame is provided on the side of the frame body in contact with the film or sheet. When fitting a plate to a body with a film and sheets therebetween, the gap is eliminated by pushing and stretching the film and the sheets, and a film is provided with a corner portion that can be fitted. Extension support jig. 2. The film or sheet according to claim 1, wherein the film or sheet is a film or sheet for a projection screen, and the self-supporting plate is a lens sheet provided with a lens on at least one surface. A film and sheet stretching support jig, which is attached to both side faces in a direction in which a film sheet of a self-supporting sheet is stretched along a lens surface side. 3. The film and sheet stretching support jig according to claim 2, wherein the height of the R-shaped convex portion of the lens sheet is higher than the height of the lens surface. 4. A jig for supporting a film or a sheet according to claim 1, wherein the corner portion has elasticity for adjusting a stretching force (extension tension). 5. The film and sheet stretching support jig according to claim 1, wherein the film and the sheet are stretched and supported by two opposing sides of one set of the frame body. 6. The film according to claim 1, wherein the attachment of the film or sheet to the self-supporting plate is fixed by a heat sealing method or an ultrasonic fusion method. An extension support jig for sheets.