JP3341228B2 - Extension support jig for films and sheets - Google Patents

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 a non-self-supporting film or sheet on a frame, and more particularly to a jig for extending and supporting a lens film for a projection screen such as a television.

[0002]

2. Description of the Related Art Fresnel lenses for projection screens of televisions and the like are conventionally mainly formed of concentric circular Fresnel lenses using self-supporting relatively thick sheets and formed by concentric lenses. And a mold using a UV-curable resin. In recent years, lens sheets have been made thinner to reduce image quality degradation due to lens optical loss, etc.
In response to a demand for continuous production to improve productivity, a linear Fresnel lens formed by forming lenses in parallel in a straight line,
Those formed on thin films have been proposed. Since the linear Fresnel lens has a linear shape, it is manufactured using a machine that applies a gravure printing machine to transfer a UV curable resin into a predetermined shape on a continuous thin film, And a method such as an ultraviolet curing method in which a linear Fresnel lens is formed by curing. When the linear Fresnel lens film produced in this manner is used for 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 a frame or The second method of stretching while supporting on a support such as a cabinet is known,
The second method is superior to the lens sheet in terms of thinning and productivity. 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 the film is tensioned 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. For this, first of all, a holding jig capable of securely fixing the lens film was required.

[0003]

As described above, for a thin linear Fresnel lens film having no self-sustainability that is continuously produced for a projection screen, the film itself is stretched while being supported by a frame. A simple, stretch-supporting jig that can be securely fixed, can continue to apply tension without causing wrinkles or loosening of the film, and does not require any knack for fixing. Was sought. Under such circumstances, the present invention
For films and sheets, such as linear Fresnel lens films, which are continuously produced for projection screens, it has a relatively simple structure and does not wrinkle or loosen films and sheets. It is an object of the present invention to provide a stretching support jig which can be made and can keep applying tension.

[0004]

SUMMARY OF THE INVENTION The film and sheet stretching support jig of the present invention is for stretching and supporting a self-supporting synthetic resin film or sheet so that wrinkles or looseness do not occur. Jig, a frame body consisting of a square inner frame and an outer frame, the upper frame and the outer side surface of the inner frame, over the film, sheets and the like, over the outer frame, sandwiching the film, The sheets are stretched and supported, and on two to four sides of the frame body facing the outer side surface of the inner frame, the outer frame surface faces toward another opposite side of the outer frame. Protruding, the first protrusion is provided, the corner portion where the upper surface of the inner frame and the outer side surface meet, along the outer side surface, protruding to the upper surface side, the tip position substantially extended the upper surface The second, which is resilient to the side of another inner frame that is A projection portion, and a space portion in which the second projection portion can bend by a predetermined amount, and is fitted to the first projection portion at a position on the outer side surface of the inner frame away from the corner portion. When the outer frame is overlaid on the inner frame via the film and the sheets, the first projection of the outer frame is formed by the second protrusion of the inner frame via the film and the sheets. While pressing the projections, pull the film, sheets, etc., while the second projection is bent by the film, sheets,
The first protrusion is fitted over the recess of the inner frame via the film and the sheets after passing the second protrusion to support the film and the sheets.
The second projection of the inner frame is provided with a predetermined R shape toward the side of the other inner frame facing the second frame. Then, the second protrusion and the space portion of the inner frame, and the first protrusion of the outer frame,
It is characterized by being uniformly arranged at predetermined intervals. Further, the above-mentioned films and sheets are lens sheets for a projection screen.

[0005]

The film and sheet stretching support jig of the present invention has a relatively simple structure with respect to films and sheets by being constructed as described above.
It is possible to provide a stretching member that can be securely fixed without causing wrinkles or looseness in sheets and can continue to apply tension (tension). More specifically, the film and sheet-type stretch supporting jig of the present invention comprises a first protrusion of the outer frame and a second protrusion of the inner frame, and the outer frame is formed on the inner frame through the film and the sheets. When covering, expand the film, sheets, etc., at the first projection of the outer frame and the recess of the inner frame,
The film and the sheets are supported by fitting through the film and the sheets. After the film and the sheets are stretched and supported, the second protrusion of the inner frame remains bent by the film and the sheets. Changes,
Wrinkles and looseness do not occur on films and sheets. And the second protrusion of the inner frame is provided with a predetermined R shape bent toward the side of the other inner frame facing, so that it is possible to apply force evenly to films and sheets. I have to. The second protrusions and the space portions of the inner frame and the first protrusions of the outer frame are all uniformly arranged at a predetermined interval, so that the film and the sheets can be supported in a stretched manner. At this time, it is assumed that wrinkles and loosening are unlikely to occur. In particular, films and sheets are effective for extending and supporting a lens sheet for a projection screen.

[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. FIG. 1 shows a state after the stretching support is completed by using the stretching support jig for the film and sheets formed of the frame of the present embodiment,
FIG. 1A is a plan view showing the entire stretching support jig for films and sheets, and FIG. 1B is a plan view of A1- in FIG. 1A.
It is sectional drawing in A2. FIG. 1B additionally shows a cabinet for fixing the inner frame. FIG. 2 shows an initial state when performing the stretching support.
It is a figure about the part corresponding to (b). 1 and 2
Inside, 100 is a frame, 110 is an inner frame, 111 is a second protrusion, 111S is an R-shaped surface, 112 is a space, 113 is a recess, 114 is a side surface, 115 is a top surface, 120 is an outer frame,
121 is a first projection, 124 is a side surface, 130 is a linear Fresnel lens sheet, 140 is a lenticular lens sheet, and 150 is a cabinet. As shown in FIG. 1, the film and sheet stretching support jig of this embodiment includes an inner frame 110 and an outer frame 120.
The linear Fresnel lens sheet 130 is extended and supported by covering an outer frame 120 on the side surface portion 114 and the upper surface portion 115 of the 10 via a linear Fresnel lens sheet 130. Although hard polyvinyl chloride was used for the first projection 121, that is, the outer frame, the invention is not limited to this. Since the outer frame does not have the function of supporting and expanding, a hard and tough resin such as a phenolic resin can be used. Further, polypropylene was used for the second protrusion 111, that is, the inner frame, but the present invention is not limited to this.
Any material can be used as long as it is resistant to heat and the resin has rigidity. In addition to polypropylene, for example, polycarbonate or a shape memory resin that has been recently developed can be used.

FIG. 3 is a perspective view of the inner frame 110 at a portion corresponding to FIG. FIG. 3A shows the present embodiment, in which the second protrusion 111 is provided entirely along the side surface of the inner frame. However, as shown in FIG. May be provided at predetermined intervals. In addition, the second protrusion 1
The same applies to the space 112 corresponding to 11. As described above, when the second protrusions 111a are provided only in necessary portions, the first protrusions 121 of the outer frame 120 are also provided at predetermined intervals corresponding to the second protrusions 111a. Is preferred. In this embodiment, only the two opposite sides of the frame are
Although the configuration for supporting the extension is provided as shown in (b), it may be provided on four sides of the frame. Further, FIG.
FIG. 4B is a diagram showing a case where the second protrusions 111 shown in FIG. 3A are provided on four sides of the inner frame. FIG. 4B shows the second protrusions 111a shown in FIG. It is a figure in the case of being provided in two opposite sides.

Next, the operation when the outer frame 120 is put on the side surface portion 114 and the upper surface portion 115 of the inner frame 110 via the linear Fresnel lens sheet 130 to perform the extension support will be described with reference to FIGS. This will be explained. As shown in FIG. 2, first, in the initial stage of the operation when performing the stretching support,
The first protrusion 121 of the outer frame 120 is connected to the second protrusion 11 of the inner frame 110 via the linear Fresnel lens sheet 130.
By only hitting 1, the first protrusion 121 pulls and stretches the linear Fresnel lens sheet 130 while sliding with the linear Fresnel lens sheet 130 while pushing and bending the second protrusion 111 in the pushing direction. Next, the first protrusion 121 is moved to the linear Fresnel lens sheet 130.
While passing through the second protrusion 111,
The linear Fresnel lens sheet 130 is supported by fitting the concave portion 113 provided on the side surface portion 114 of FIG. At this time, the linear Fresnel lens sheet 130 is pulled and extended so that the R-shaped surface 111S provided on the second protrusion 111 is in contact with the surface of the linear Fresnel lens sheet 130. As shown in FIG. 1B, the second protrusion 111 bends and pulls the linear Fresnel lens sheet 130 outward by its elasticity, but the second protrusion 111 is balanced with the tensile force from the linear Fresnel lens sheet 130. Stop at the position. Therefore, even when the linear Fresnel lens sheet 130 expands and contracts due to temperature and humidity, the second projection 111 changes its position in accordance with the change in the tensile force from the linear Fresnel lens sheet 130 by its elasticity, The lentil 130 can be kept in a state without wrinkles or looseness.

In some cases, for example, an elastic rubber material having a predetermined elasticity is inserted into the space 112 shown in FIG. The tension applied to the Fresnel lens sheet 130 may be adjusted. In addition, as shown in FIG. 1 (b), the film and sheet stretching jig of this embodiment stretches and supports the linear Fresnel lens sheet 130 by being held together with the lenticular lens sheet 140. It goes without saying that the sheets can be extended and supported by themselves.

[0010]

According to the present invention, as described above, it is possible to provide a film and sheet stretching support jig which has a simple structure and can reliably support films and sheets. In particular, when a linear Fresnel lens film made of a thin film without independence, which is used for a projection screen, is stretched, it is possible to provide a simple jig capable of reliably supporting the stretching.

[Brief description of the drawings]

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

FIG. 2 is a view for explaining a stretching operation in a cross section of a main part of a film and sheet stretching jig of the embodiment.

FIG. 3 is a perspective view of a main part of an inner frame.

FIG. 4 is a diagram provided with an inner frame.

[Explanation of symbols]

Reference Signs List 100 frame body 110, 110a inner frame 111, 111a second protrusion 111S R-shaped surface 112, 112a space 113, 113a recess 114, 114a side surface 115 upper surface 120 outer frame 121 first protrusion 124 side surface 130 Linear Fresnel lens sheet 140 Lenticular lens sheet 150 Cabinet

Claims (4)

(57) [Claims] 1. A jig for extending and supporting a self-supporting synthetic resin film or sheet so as not to generate wrinkles or looseness, comprising a square inner frame and an outer frame. In the frame, cover the outer frame on the upper and outer side surfaces of the inner frame via films and sheets, sandwich the film,
It is used to stretch and support sheets, and the opposite side of the frame faces the outer side surface of the inner frame on two or four sides facing each other. Protruding, the first protrusion is provided, and the corner portion where the upper surface of the inner frame and the outer side surface meet, along the outer side surface,
A second projection that projects to the upper surface side, the tip position is located at a position substantially extending the upper surface, and has a resilient bend toward the side of another opposed inner frame, and the second projection bends by a predetermined amount. And a concave portion that fits with the first protrusion at a position apart from the corner on the outer side surface of the inner frame, so that the outer frame can be placed on the inner frame. When covering over the film, sheets, etc., the first protrusion of the outer frame,
Film, while pushing the second protrusion of the inner frame through the sheets, the film, the sheets are pulled, the film, the second protrusion is bent by the sheets, the first protrusion is, A film and sheet stretching support jig, which fits into a recess of an inner frame via a film and sheets after passing through a second protrusion, and supports the films and sheets. 2. The second projection of the inner frame according to claim 1,
A stretching support jig for a film or a sheet, wherein a predetermined rounded shape is provided which is bent toward the side of another inner frame facing the other inner frame. 3. The second projection and the space of the inner frame according to claim 1 and 2, and the first projection of the outer frame are all uniformly arranged at predetermined intervals. Jigs for supporting films and sheets. 4. A film and sheet stretching support jig, wherein the film or sheet according to claim 2 is a lens sheet for a projection screen.