JP3594742B2 - Extension support jig for films and sheets - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a jig for extending and supporting a film or sheet having no self-supporting state on a frame along a lens sheet having self-supporting state, and in particular, for supporting a film or sheet for a projection screen such as a television. About jigs.
[0002]
[Prior art]
Conventionally, Fresnel lenses for projection screens of televisions and the like are mainly composed of circular Fresnel lenses that use a self-supporting relatively thick sheet and are formed concentrically with lenses. Molding using a mold was performed.
In recent years, lenses with thin lenses formed on thin films have been manufactured due to the demand for thinner lens sheets to reduce image quality deterioration due to lens optical loss and the like and continuous production to improve productivity. It has become.
For example, a linear Fresnel lens, which is formed by arranging lenses in parallel in a straight line, has a linear shape. 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.
When the thin and poorly self-supporting film lens produced in this way is used as a projection screen, as a stretching support method, a rigid plate, for example, the first method of tying to a lenticular lens sheet, the film itself is framed The second method of stretching while supporting it on a support such as a body or a cabinet is known.However, from the viewpoint of productivity in consideration of the probability of occurrence of wrinkles and loosening and further thinning, the second method is preferred. Is better.
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 continue, and it took quite a bit 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]
[Problems to be solved by the invention]
As described above, for a thin linear Fresnel lens film that is continuously produced for a projection screen and is not self-supporting, a reliable film is stretched while supporting the film itself on a support such as a frame or a cabinet. There is a need for a simple, stretch-supporting jig that can be fixed, can continue to apply tension without causing wrinkles or loosening of the film, and does not require any knack for fixing. Was.
Under such circumstances, the present invention provides a film and a sheet for a projection screen with a relatively simple structure, and does not generate wrinkles or looseness on the film or a sheet, and thus can be reliably used. An object of the present invention is to provide a stretching support jig that can be fixed and can be continuously applied with tension.
[0004]
[Means for Solving the Problems]
The film and sheet stretching support jig of the present invention is a method for extending a self-supporting plate along a surface of a self-supporting synthetic resin film or sheet along a surface of the self-supporting plate. Affixed on both side surfaces of the film, and by attaching a self-supporting plate to the rectangular frame with the film and sheets interposed therebetween, to stretch and support the film and the sheets on the frame. The jig is a self-supporting plate, in which R-shaped protrusions are provided at both ends in the direction in which the film and sheets are spread, and the R-shaped protrusions and plate side surfaces are provided. The film and the sheet are fitted to the frame at the periphery of the sheet including the sheet, and when the film and the sheet are stuck on the side of the sheet along the sheet with the self-supporting property, the self-supporting property From the R-shaped protrusions at both ends of the plate with A gap is formed between the film and the sheet of the frame, on the side in contact with the sheet, the film is fitted to the frame with the sheet and the sheet interposed therebetween, and the film and the sheet are stretched. It is characterized in that a gap is eliminated and a corner portion that can be fitted is provided.
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.
Further, the corners described above are characterized in that they have elasticity for adjusting the expanding force (extension tension).
Further, in the above, the film and the sheets are stretched and supported by one set of two opposite 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.
Further, the R-shaped protrusion has an arc-shaped projection having a cross section facing the outside, and is formed on the lens forming surface side of the lens sheet.
[0005]
[Action]
The film and sheet stretching support jig of the present invention has a relatively simple structure with respect to the film and sheet, and has wrinkles and slacks with respect to the film and sheet, by being configured as described above. It is possible to provide an expansion member that can be securely fixed without generating the tension and can be continuously applied with 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 of the film or sheet stretching surface side. A film is 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 via a film and sheets. When affixed on the side surface, a gap is formed between the film and the sheet from the R-shaped protrusions at both ends of the plate to the side surface of the plate. This is achieved by eliminating the gap while extending the film or sheet when fitting the board to the body with the film or sheet interposed therebetween, and by providing a corner 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. Along with the self-supporting plate film, by sticking at both end sides in the direction in which sheets are stretched, and the height of the R-shaped convex portion of the lens sheet is By setting the height higher than the height, the stretching support can be made effective without being affected by the lens forming surface or the lens shape of the lens sheet in the stretching support of the film or sheet for the projection screen.
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 heat sealing or ultrasonic fusion, 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 whole structure can be simplified by supporting the film and the sheets on only one set of two opposing sides.
[0006]
【Example】
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. 1A is a plan view showing a state after the extension support is completed using the film and sheet extension support jig of the present embodiment, and FIG. 1B is a plan view of FIG. FIG. 2A is a cross-sectional view taken along line A1-A2, FIG. 2A is a cross-sectional view showing a state in which a film is stretched on a lens sheet made of a self-supporting plate, and FIG. .
1 and 2, reference numeral 100 denotes a stretching support jig, 110 denotes a film, 120 denotes a frame, 121 denotes a corner, 122 denotes an R-shaped concave portion, 125 denotes a lens sheet fixing portion, and 130 denotes a lens sheet (self-supporting). A), 131 is a plate-like sheet, 131S is a side surface, 133 is a lens portion, 135 is an R-shaped convex portion, 140 is a gap, and 150 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 or 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 the frame 120, as shown in FIG. As shown in (2), the support is performed by extension.
In particular, the stretching support jig of the present embodiment is effective when a television projection screen made of a film or sheet having no self-supporting is used while being stretched and supported on a lens sheet having freestanding. Is not limited to this.
[0007]
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: When the film 110 is stretched on the lens sheet 130 by providing the arc-shaped R-shaped convex portion 135, a gap 140 extends from the R-shaped convex portion 135 to the side surface 131S of the plate-like sheet 131 of the lens sheet. However, when the lens sheet 130 with 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 whole 110 extends, 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.
In addition, 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, and when the lens sheet 130 is fitted to the frame 120, as shown in FIG. As shown in (), the ends of the heat seal portion 150 and the film 110 are sandwiched and fixed between the frame body 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.
[0008]
In the present embodiment, an R-shaped concave portion 122 is provided in the frame body 120 in the same shape as the R-shaped convex portion 135 of the lens sheet 130 so that the R-shaped concave portion 122 is fitted with no gap therebetween with the film 110 interposed therebetween. By doing so, the expansion is more certain.
Although polypropylene is used as the material of the frame body 120, a harder metal material such as polyvinyl chloride or aluminum may be used depending on the degree of the expanding force.
[0009]
As a modified example of the frame body, the R-shaped concave portion 122 and the corner portion 121 can be formed as shown in FIG. In this case, as shown in FIG. 4B, the film 410 is stretched by the corners 421 while being fitted to the frame 120.
Further, the shape shown in FIG. Also in this case, as shown in FIG. 5B, the film 510 is expanded by the corners 521 at the time of fitting.
Note that the corner 421 shown in FIG. 4 and the corner 521 shown in FIG. 5 are required to be made of a material having appropriate elasticity that can withstand a force (extension tension) for stretching the film.
[0010]
In the present 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 with the lens sheet 130 extending in one direction. This makes it easy to extend. If it is desired to expand more firmly, by fixing the 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, it is not affected by the shape of the lens. .
[0011]
The operation of the film and sheet stretching support jig 100 of this embodiment will be described in more detail with reference to FIG.
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 are gradually approached to a position where the frame 120 and the lens sheet 130 are fitted with the film 110 interposed therebetween. (FIG. 3 (a))
Next, the inner surface of the frame body 120 is gradually fitted while being brought into contact with the side surface 131S of the plate-like sheet 131 where the heat seal portion 150 is located. (FIG. 3 (b))
As the fitting progresses, the corners 121 come into contact with the film 110, and push the film 110 to gradually narrow the gap 140 so as to extend the entire film 110. (FIG. 3 (c))
At this time, the lens sheet fixing portion 125 on the inner wall on the side surface of the frame 120 gradually passes through the side surface 131S.
Then, at the same time when the lens sheet fixing portion 125 of the frame body 120 has passed through the side surface 131S, the R-shaped concave portion 122 is fitted into the R-shaped convex portion 135 via the film 110 without any gap, and FIGS. The gap 140 shown in FIG. (FIG. 3 (d))
Further, with regard to 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, so that the fixing is more reliable.
[0012]
【effect】
As described above, the present invention makes it possible to provide a film and sheet stretching support jig that can reliably support 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 diagram of a film and sheet stretching jig according to an embodiment. FIG. 2 is a diagram for explaining a state in which a film is stretched on a lens sheet. FIG. FIG. 4 is a diagram illustrating a modified example of the frame body. FIG. 5 is a diagram illustrating a modified example of the frame body.
REFERENCE SIGNS LIST 100 Extension supporting jig 110 Film 120 Frame 121 Corner 122 R-shaped recess 125 Lens sheet fixing part 130 Lens sheet (self-supporting plate)
131 plate-shaped sheet 133 lens portion 135 R-shaped convex portion 140 gap 150 heat seal portion 410, 510 film 420, 520 frame body 421, 521 corner portion 422 concave portion 425, 525 lens sheet fixing portion 430, 530 lens sheet 431, 530 Plate-shaped sheet 435, 535 R-shaped convex part 440, 540 Gap 450, 550 Heat seal part

Claims (6)

Films and sheets made of a self-supporting synthetic resin are applied along one surface of the self-supporting plate at both ends in the direction in which the self-supporting plate extends, and films and sheets are formed. A jig for extending and supporting a film and sheets on the frame by fitting a self-supporting plate to a rectangular frame with a self-supporting plate, R-shaped protrusions are provided at both ends in the direction in which the sheets are stretched on the side in which the sheets are stretched, and films and sheets are formed on a frame at a peripheral portion of the plate including the R-shaped protrusions and the plate side surfaces. When a film or sheet is attached along the side of the sheet along the self-supporting plate, the R-shaped protrusions at both ends of the self-supporting plate are used to fit the side of the plate. A gap is formed between the film and the sheet, and the frame film, On the side in contact with the sheets, when the film is fitted to the frame with the sheets interposed therebetween, the gap is eliminated while the film and the sheets are pushed out, and a corner portion capable of being fitted is provided. An extension support jig for films and sheets, characterized in that: The film or sheet according to claim 1 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, and the film or sheet is disposed along the lens surface side. A film and sheet stretching support jig, which is attached to both side surfaces in the direction in which the self-supporting film sheet is stretched. 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 film and sheet stretching support jig, wherein the corners according to claim 1 have 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 sets of opposite sides of the frame body. 6. The stretch support of a film or sheet 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. jig.

Images