JPH08201921A - Extension and supporting jig for film sheet and the like - Google Patents

Abstract

PURPOSE: To provide the comparatively simple-structure extension and supporting jig of a film or a sheet surely fixing the film, the sheet and the like without making it wrinkle and continuously imparting tension (tensile force) to it. CONSTITUTION: This is the extension and supporting jig 100 for extending and supporting the film, the sheet and the like which is not provided with self- standing property and which is made of synthetic resin on a cabinet and the like without making it wrinkle and slacken. Then, it is paired with a holding jig holding the film, the sheet and the like and fixed by being faced to the cabinet and the like. By pulling the film 150 or the sheet by using an eccentric 110 or a bolt nut provided on the jig 100 while holding it, it is extended.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Conventionally, in a Fresnel lens for a projection screen such as a television, a circular Fresnel lens in which concentric lenses are concentrically formed using a relatively thick sheet that is self-supporting is mainly formed by hot pressing. Molding was performed by using a mold using a UV curable resin. In recent years, a thin lens sheet has been used to reduce deterioration of image quality due to optical loss of the lens,
Due to the demand for continuous production to improve productivity, we have developed a linear Fresnel lens that is formed by arranging lenses in a straight line in parallel.
Those formed on a thin film have come to be manufactured. Then, for its production, a machine applying a gravure printing machine transfers an ultraviolet curable resin to a predetermined shape on a continuous thin film and cures it with ultraviolet rays to form a linear Fresnel lens. The method such as the law was adopted. When the linear Fresnel lens film produced in this way is used for a projection screen, the stretching and supporting method includes a rigid plate, for example, a first method of tying the film to a lenticular lens sheet, a frame itself, a cabinet or the like. The second method is known, in which the lens sheet is stretched while being supported by the support, but the second method is superior in terms of thinning the lens sheet and productivity. However, with the method of stretching while supporting the film itself on the frame, it is difficult to secure it securely,
Further, it is difficult to keep applying tension to the film without generating wrinkles, and it is necessary to fix the film with a considerable amount of knack.

[0003]

As described above, for a thin linear Fresnel lens film which is continuously produced for a projection screen and has no self-supporting property, it is necessary to stretch the film while supporting the film itself on a frame. There is a need for a simple extension support jig that can be securely fixed, that can continue to apply tension without causing wrinkles on the film, and that does not require any tips for fixing. Was there. Under the circumstances, the present invention has a relatively simple structure for films and sheets such as linear Fresnel lens films that are continuously produced for projection screens, and has a wrinkle for the films and sheets. The present invention is intended to provide a spreading support jig that can be securely fixed without generating a tension and can continue to apply tension.

[0004]

Means for Solving the Problems The film and sheet spreading and supporting jig of the present invention is a film and sheet made of synthetic resin having no self-supporting property, which is spread on a cabinet or the like so that wrinkles and slacks do not occur. A stretching support jig for supporting, which is paired with a holding jig for holding films and sheets, is fixed facing a cabinet or the like, and is held by the stretching support jig while holding the films and sheets. It is characterized in that the film or sheets are stretched by pulling the film or sheets with the eccentric or bolt nut provided. and again,
The above-mentioned films and sheets are lens films for projection screens.

[0005]

The spreading support jig for films and sheets according to the present invention is configured as described above, and has a relatively simple structure with respect to films and sheets.
This makes it possible to provide a tensioning member that can be securely fixed to the sheets without wrinkling and can be continuously tensioned. Specifically, the film and sheet spreading support jig of the present invention is paired with a holding jig that holds the film and sheets, and is fixed facing the cabinet or the like, while holding the film and sheets,
The film and sheets are stretched by pulling the film and sheets with the eccentric or bolts and nuts provided on the stretching support jig, so that the stretch adjustment can be appropriately performed with a simple structure and the supporting It is supposed to be possible. In particular, when the above-mentioned spreading jig is used for spreading the lens film for a projection screen, it is effective in terms of productivity.

[0006]

EXAMPLE An example of a spreading and supporting jig for films and sheets according to the present invention will be described with reference to the drawings. First, Example 1 of the spreading support jig for films and sheets of the present invention will be described.
Example 1 is a spreading support jig that uses eccentric to spread films and sheets that are not self-supporting. FIG. 1A is a cross-sectional view of the spreading support jig of Example 1, FIG.
1B is a top view thereof, and FIG. 1C is an enlarged plan view of an eccentric (cam) portion which is a main portion. 1 in FIG.
00 is an extension support jig, 110 is an eccentric (cam), 111 is a spring, 112 is a washer, 1
13 is a bolt, 120 is a cabinet, 121 is a cabinet side frame, and 150 is a linear Fresnel lens film. As shown in FIG. 2, the extension supporting jig 100 of this embodiment is paired with the holding jig 200 and supports the linear Fresnel lens film 150 in an expanded state. Since the extension support jig 100 of this embodiment uses the eccentric (cam) 110 and the spring spring 111, the linear Fresnel lens film 150 supported by the rotating force to rotate is pulled and the tension is continuously applied. be able to. The cabinet side frame 1
As a material of 21, a material having a small friction coefficient and being strong is preferable, and polypropylene, polyvinyl chloride, Teflon, phenolic resin or the like is used.

As a modified example of the present embodiment, there is also a spreading support jig of a system in which only an eccentric (cam) 110 is used without using a spring spring, and the eccentric (cam) 110 applies force while fixing. In this case, the groove 115 and the protrusion 115 shown in FIG.

The holding jig 200 holds the linear film lens film 150 in a state of being fixed to the groove 123 of the cabinet 120 as shown in FIG. 3, but the structure of the holding jig 200 is not limited to this. It is not done. Further, as shown in FIG. 3, the holding jig 200 has a sponge 21 on the side in contact with the linear film lens film 150.
The position of the sponge 210 is slightly higher than the left and right sides 125A and 125B of the cabinet 120. The reason for setting in this way is that when tension is applied to the linear Fresnel lens film 150, the linear film lens lens 150 hits the sponge 210, and wrinkles are less likely to shift. actually,
Since it is not enough to provide the sponge, the linear support lens film 150 is spread more lightly by the spreading support jig of the above embodiment.

Next, a second embodiment of the spreading support jig for films and sheets of the present invention will be described. Example 2 is a bolt,
This is a spreading support jig for spreading a linear film lens film by using a nut. FIG. 4A is a cross-sectional view of the spreading support jig of the second embodiment, FIG. 4B is a top view thereof, and FIG. 4C is an enlarged plan view of bolts and nuts which are essential parts. . In FIG. 4, 400 is an extension support jig, 410 is a bolt, 411 is a loosening prevention nut, 412 is a cabinet side stopper, 420 is a cabinet, 421 is a cabinet side frame, and 450 is a linear Fresnel lens film. In the case of, the linear Fresnel lens film 45 which is supported by turning the bolt 410 in the loosening direction is supported.
Apply 0 tension. In the case of this method, it is possible to fix while applying a certain force, but it is not possible to continuously apply tension.

Next, a third embodiment of the film and sheet spreading and supporting jig of the present invention will be described. Example 3 is also a bolt,
It is a spreading support jig that stretches films and sheets using nuts. 5A is a cross-sectional view of the extension support jig of Example 3, FIG. 5B is a top view thereof, and FIG. 5C is an enlarged plan view of bolts and nuts, which are essential parts. . Figure 5
In the drawing, 500 is an extension support jig, 510 is a bolt, 511 is a loosening prevention nut, 512 is a cabinet side stopper, 513 is a female screw with a washer for tensioning, 52
0 is a cabinet, 521 is a cabinet side frame, 55
0 is a linear Fresnel lens film. Also in the case of this embodiment, the linear Fresnel lens film 550 is stretched by applying tension to the linear Fresnel lens film 550 by using the bolt 510 and the loosening prevention nut 511 as in the case of the second embodiment. However, the difference from the second embodiment is that the bolt is turned in the tightening direction when the tension is applied.

Next, an example in which the linear Fresnel lens film is stretched and supported by using the stretching jig and the holding jig mentioned in the above embodiment along the self-supporting lenticulars sheet and closely contacting them A brief description will be given with reference to FIG. First, the lenticular sheet 660 is sandwiched and fixed to the exterior frame body 610 (FIG. 6A). At this time, the lenticulars sheet 660 is stretched in an arc on the side to be in close contact with the linear Fresnel lens film 650. Then, as shown in FIG. 6B, the exterior frame body 610.
Is fixed to the cabinet 620, and the linear Fresnel lens film 650 is stretched and supported by the method described in the above embodiment. By doing so, the linear Fresnel lens film 650 can be surely brought into close contact with the reticle lens sheet 660 and expanded.

[0012]

As described above, the present invention can provide a stretching support jig for films and sheets, which has a simple structure and can reliably support the stretching of films and sheets. In particular, when a linear Fresnel lens film made of a thin film having no self-supporting property, which is used for a projection screen, is stretched, it is possible to provide a simple jig capable of ensuring stretch support.

[Brief description of drawings]

FIG. 1 is a diagram of a stretch support jig for films and sheets of Example 1.

FIG. 2 is a diagram for explaining expansion support using a expansion support jig.

FIG. 3 is a sectional view of a holding jig.

FIG. 4 is a diagram of a stretching and supporting jig for Example 2 film and sheets.

FIG. 5 is a diagram of a stretch support jig for films and sheets in Example 3

FIG. 6 is a diagram for explaining an example in which a linear Fresnel lens film is closely attached to a lenticular sheet and spread.

[Explanation of symbols]

100 Extension support jig 110 Eccentric (cam) 111 Spring spring 112 Washer 113 Bolt 115 Position fixing groove and protrusion 120 Cabinet 121 Cabinet side frame 123 Cabinet groove 125A, 125B Cabinet side 150 Linear Fresnel lens film 200 Holding jig 400 Extension support Jig 410 Bolt 411 Loosening prevention nut 412 Cabinet side stopper 420 Cabinet 421 Cabinet side frame 450 Linear Fresnel lens film 500 Extension support jig 510 Bolt 511 Loose prevention nut 512 Cabinet side stopper 513 Female screw with tension washer 520 Cabinet 521 Cabinet side frame 550 Linear Fresnel lens film 600 Extension support Holding jig 610 Exterior frame 620 Cabinet 650 Linear Fresnel lens film 660 Lenticular sheet

Claims (2)

[Claims] 1. A stretch-supporting jig for stretch-supporting a film or sheet made of a synthetic resin having no self-supporting property in a cabinet or the like so as to prevent wrinkles and slack, and holds the film and sheet. It becomes a pair with a holding jig that is fixed to face a cabinet or the like, and while holding the film and sheets, by pulling the film and sheets with the eccentric or bolt nut provided on the spreading support jig, A stretching support jig that stretches films and sheets. 2. A stretch supporting jig according to claim 1, wherein the films and sheets are lens films for projection screens.