JPH08262577A - Holding jig for films and sheets - Google Patents

Abstract

PURPOSE: To provide a holding jig for films or sheets capable of surely fixing the films or sheets with a relatively simple construction. CONSTITUTION: A first member 110 and a second member 120 are fitted by a first fitting part 130 consisting of rugged parts of a wedge shape by pressing both members in such a manner that the respective one-side surfaces come into contact with each other. The first member 110 and the second member 120 hold the film or sheet by forming a spacing part smaller in spacing than the thickness of the film or sheet to be held. In addition, the spacing part is provided with a projection 141 of a wedge-shaped projecting shape crossing the spacing part at one member. The other member is provided with a through- hole 142 fitting onto the projection of the projecting shape to form a second fitting part 140. The projection of the wedge-shaped projecting shape penetrates the through-hole and the front end 141A is hooked and fixed in the through-hole part, by which the film or sheet is held.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a holding jig for holding non-self-supporting films and sheets, and more particularly, a holding jig for holding a lens film used for a projection screen such as a television. Regarding jigs.

[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 proposed. Since the linear Fresnel lens has a linear shape, the UV-curable resin is transferred to a predetermined shape on a continuous thin film by a machine applying a gravure printing machine, A method such as an ultraviolet curing method has been adopted in which the linear Fresnel lens is formed by being cured by. When the linear Fresnel lens film produced in this manner 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 film itself or a frame. A second method of stretching while supporting it on a support such as a cabinet is known,
The second method is superior in terms of thinning the lens sheet 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 cabinet, it is difficult to secure it securely, and tension is applied to the film without causing wrinkles. It was difficult to continue, and fixing required a lot of tricks. That is, in this second method, it is required to constantly apply tension to the lens film and to easily hold the entire lens film so that wrinkles and slack are not generated. It was For this purpose, 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 which is continuously produced for a projection screen and has no self-supporting property, when the film itself is stretched on a frame or the like, or a cabinet or the like is used. When the film is stretched while being directly supported by a support, firstly, there has been a demand for a holding jig which can surely fix the film and does not require any tips for fixing. Under the circumstances, the present invention is capable of securely fixing to a film, such as a linear Fresnel lens film continuously produced for a projection screen, a sheet with a relatively simple structure, and An object of the present invention is to provide a holding jig that does not require any tips, and at the same time, an object of the present invention is to provide a method for supporting the spreading of films and sheets using the holding jig.

[0004]

Means for Solving the Problems A jig for holding films and sheets according to the present invention comprises a first member and a second member,
A holding jig for sandwiching and holding films and sheets made of synthetic resin having no self-sustainability by the first member and the second member from the front and back sides, respectively, and the first member and the second member. Are those which are pressed against each other so that one surface is in contact with the other, and are fitted to each other at the first fitting portion composed of a wedge-shaped uneven portion formed on the matching surface side, and the other members are fixed to each other. Yes, when fitting the first member and the second member in the first fitting portion, the first member and the second member, than the thickness of the film, sheets to be held A gap is formed with a small gap to sandwich a film or sheets in the gap, and in the gap, one member is provided with a wedge-shaped convex projection that crosses the gap. The other fitting is provided with a through hole that fits into the convex projection to form the second fitting portion. When fitting the first member and the second member in the first fitting portion, the tip end portion provided on one member in the second fitting portion is greatly The wedge-shaped convex projection penetrates through the film and sheets, penetrates through the through hole formed in the other member, and the tip is fixed so that the tip is caught in the through hole, and the film is fitted, It is characterized in that it holds sheets. Then, on the surface of the first member or the second member forming the gap portion in the above, a film to hold,
A jig for holding films and sheets, characterized in that a mold fitted to a mold formed in a portion for holding sheets is provided. The tip of the convex projection of the second fitting portion is a wedge-shaped blade or needle. Further, the above-mentioned films and sheets are lens films for projection screens.

[0005]

When the film and sheet holding jig of the present invention is configured as described above, it is possible to provide a holding jig that can securely fix the film and sheets to the film and sheets with a relatively simple structure. It is possible. Specifically, the film, the holding jig for sheets of the present invention, the first member and the second member, by fitting the first fitting portion consisting of a wedge-shaped concave-convex shape portion, A gap portion having a smaller gap than the thickness of the film or sheets to be held is formed so that the film or sheets can be held in the gap portion, and the wedge portion that crosses the gap portion in one member is provided in the gap portion. The mold is provided with a convex projection, and the other member is provided with a through hole that fits into the convex projection to form a second fitting portion. At the time of fitting the one member and the second member, in the second fitting portion, the wedge-shaped convex projection provided on one member penetrates the film or sheets, and the other Through the through hole formed in the member, and the tip is fixed so that the tip is caught in the through hole And a, it is to ensure the film, the retention of the sheets. Then, by holding a film to be held on the surface of the first member or the second member forming the gap portion, a mold fitted to the mold formed in the holding portion of the sheets is held. Is more robust. And also, by holding the tip of the convex projection of the second fitting portion is a wedge-shaped blade or needle, a film to be held,
It is assumed that it is not necessary to make holes in advance in the places where the sheets come into contact with the convex protrusions. Further, when the film or sheet is a lens film for a projection screen, it is possible to provide a mold in a holding portion during a normal manufacturing process, which is particularly effective in terms of productivity and holding state. .

[0006]

EXAMPLE An example of a jig for holding films and sheets according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a holding jig for films and sheets of this embodiment, and FIG. 2 is a view showing a lens sheet held by the holding jig shown in FIG. However, the cross section of the holding jig in FIGS. 1 and 2 is a cross section of a main part for easy understanding of the configuration. In FIGS. 1 and 2, 100 is a holding jig, 110 is a first member, 111 is a surface, 120 is a second member, 121 is a surface, 130 is a first fitting portion, 131 is a convex portion, 132. Is a concave portion, 135 is a gap portion, 140 is a second fitting portion, 141 is a convex protrusion portion, 141A is a tip portion of the convex protrusion portion, 142 is a through hole, 143 is a concave portion, 150 is a stopper, 161,
162 is a linear Fresnel lens film, and 160 is a lens sheet that combines the linear Fresnel lens films 161 and 162. The holding jig 100 according to the present embodiment includes a first member 110 and a second member 120, and a linear portion is formed in a gap portion 135 formed when the first member 110 and the second member 120 are fitted together by the first fitting portion 130. Fresnel lens film 161, 16
A linear Fresnel lens film that holds 2
A lens sheet 160 composed of 61 and 162 is sandwiched and held from the front and back.

The first member 110 and the second member 120 are pressed so that the surface 111 and the surface 121 are in contact with each other, so that the convex portion 13 formed on the mating surface side.
1 and the recess 132 are fitted together by the first fitting portion 130, and the other members are fixed to each other. A gap 135 is formed when the first member 110 and the second member 120 are fitted to each other by the first fitting portion 130. The linear Fresnel is previously formed at a position corresponding to the gap 135. By arranging the portion of the lens sheet 160 composed of the lens films 161 and 162 to be held so that the front end thereof contacts the stopper 150, the lens sheet 160 can be held in the gap 135. First member 110 and second member 1
The gap of the gap portion 135 formed when fitting with 20 is the linear Fresnel lens film 161, 1
When 62 is t1 and t2, respectively, (t1 + t2)
X (50 to 99)% is suitable.

Further, the first member 110 and the second member 12
When the 0 and 0 are fitted together by the first fitting portion 130, in the second fitting portion 140, the convex protrusion 141 penetrates the linear Fresnel lens films 161, 162 and is further formed in the recess 143. Through the formed through hole 142,
The tip end 141A of the convex protrusion 141 is fixed and fitted so as to be hooked in the through hole 142, and is in a state where it does not come off. The convex protrusion 14 in the second fitting portion 140
The length of 1 is the linear Fresnel lens film 161, 1
When the 62 is held, the space is set so that it can be securely held.
The shorter the linear Fresnel lens film 161, 1
Hold 62 firmly.

FIG. 3 is a view showing the first member 110.
3A is a front view, FIG. 3B is a cross-sectional view, and FIG.
4C is a side view, FIG. 4 is a view showing the second member 120, FIG. 4A is a front view, and FIG. 4B is a cross-sectional view.
FIG. 4C is a side view. As is clear from FIGS. 3 and 4, the convex portion 131 and the concave portion 132 are the first fitting portion 130.
And the convex protrusion 141 and the through hole 142 form the second fitting portion 140. Then, the convex portion 131 and the concave portion 1
When 32 and 32 are fitted together, the convex projection 141 is fitted into the through hole 142 at substantially the same time. First fitting part 1
The 30 is continuously formed as shown in FIGS. 3 and 4, but the second fitting portions 140 are formed at predetermined intervals as shown in FIGS. 3 and 4. The pressing member 145 is provided with the linear Fresnel lens films 161 and 162 in the recess 14
Hold down to 3.

As a material of the holding jig 100, the first member 110 shown in FIG. 3 is a relatively soft and sticky material such as polypropylene or nylon, that is, it is easy to return to its original shape even if it is deformed. Things are suitable. In the case of a hard resin, the recess 132 is formed continuously, so that the recess 13
This is because it becomes difficult for the convex portion 131 to be incorporated into the second portion.
The second member 120 shown in FIG. 4 is preferably made of hard polyvinyl chloride, phenol resin, or the like, which is hard and has little dimensional distortion. This is because it is preferable that the stopper 150 and the like are hard and have no dimensional distortion.

FIG. 5 shows the first member 110 shown in FIG.
6 is a cross-sectional view when the second member 120 shown in FIG. 4 and the second member 120 shown in FIG. 4 are fitted together, and FIG. 6 is a diagram showing a modified example 1 of the present embodiment, in which a first member 610 and a second member 620 are provided. FIG. 7 is a cross-sectional view of when the first member 710 and the second member 720 are fitted together, and FIG. 7 is a view showing a second modification of the present embodiment. The figure is shown. In the case of the modified example 1 shown in FIG. 6, there is no one corresponding to the recess 143 shown in FIG.
A mold 680 that fits into the mold of the lens sheet is provided in the portion of the first member 610 that holds the lens sheet.
The first member 610 is provided with a portion having a surface 641B for holding the lens sheet 660, and a gap 641C generated when the tip end portion 641A of the convex protrusion 641 fits into the through hole 642 is The gap is smaller than the gap between the first part member 610 and the second member 620, and the lens sheet 660 is clamped and fixed in the gap 641C.
Further, a mold 680 fitted to the lens sheet 660 is provided to ensure the fixation. In the case of the second modification shown in FIG. 7, a mold 680 that fits into the mold of the lens sheet is provided in the portion of the first member 710 that holds the lens sheet. In the case of the present embodiment shown in FIG. 5 and the modified example 2 shown in FIG. 7, since the concave portions 143 to 743 are provided, the lens sheets 160 to 760 to be sandwiched are held.
Since it is in a bent state, the holding force becomes stronger.

The procedure for laminating and holding the two linear Fresnel lens films 161 and 162 as shown in FIG. 2 using the holding jig 100 of this embodiment will be described below. First, two linear Fresnel lens films are attached to each other to form a set of lens sheets 160, and alignment is performed on the second member 120. The alignment is performed by aligning the end of the lens sheet held by the stopper 150. After the alignment, a hole is made in advance at a predetermined position of the lens sheet 160 so that the convex protrusion 141 does not hit the lens sheet with a small diameter drill or the like. After that, the first member 110 is placed on top, and the convex 131 is pushed into the concave 132 by a press or the like to be a fitting portion. At the same time, the first member 110 and the second member 1
The lens sheet is sandwiched in the gap 135 formed by 20. When the convex portion 131 fits into the concave portion 132, the convex protrusion 141 passes through the hole of the lens sheet held in the gap 135, penetrates the through hole 142, and the tip portion 1
The lens sheet is fixed in a state in which 42 does not get caught in the through hole 142 portion and does not come off. In the above, the convex protrusion 1
When the tip portion 141A of 41 is a wedge-shaped blade or needle capable of piercing the lens sheet, the step of making a hole after alignment can be omitted.

[0013]

As described above, the present invention makes it possible to provide a film or sheet holding jig capable of reliably holding films and sheets with a simple structure. In particular,
(EN) It is possible to provide a jig that can reliably and easily hold a linear Fresnel lens film made of a thin film having no self-supporting property, which is used for a projection screen, when being stretched.

[Brief description of drawings]

FIG. 1 is a perspective view of a jig for holding an example film and sheets.

FIG. 2 is a diagram in which a linear funnel lens film is held by using a jig for holding the films and sheets of the example.

FIG. 3 is a diagram showing a first member of a jig for holding an example film and sheets.

FIG. 4 is a diagram showing a second member of a jig for holding an example film and sheets.

FIG. 5 is a sectional view of a jig for holding an example film and sheets.

FIG. 6 is a cross-sectional view of a modified film and sheet holding jig.

FIG. 7 is a cross-sectional view of a modified film and sheet holding jig.

[Explanation of symbols]

100, 600, 700 Holding jig 110, 610 First member 120, 620 Second member 130, 630 First fitting part 131, 631 Convex part 132, 632 Recessed part 140, 640 Second fitting part 141 , 641 convex protrusions 141A, 641A, 741A (of convex protrusions) tip portion 142, 642 through holes 143, 743 concave portion 145 pressing member 150 stopper portion 160, 660, 760 lens sheet 161, 162 linear Fresnel lens film 680 , 780 type

Claims (4)

[Claims] 1. A method for holding a film and sheets made of a synthetic resin having a first member and a second member and having no self-supporting property from the front and back sides by the first member and the second member, respectively. In the holding jig, the first member and the second member are pressed against each other so that their first surfaces are in contact with each other, and the first fitting includes a wedge-shaped concave-convex portion formed on the mating surface side. The first member and the second member are fitted to each other at the mating portion, and the other member is fixed to each other at the first fitting portion. The second member is to hold a film or sheets in the gap by forming a gap having a smaller gap than the thickness of the film or sheets to be held, and in the gap, A wedge-shaped convex protrusion that crosses the gap is provided on the member of A second fitting portion is formed by providing a through hole for fitting, and when fitting the first member and the second member at the first fitting portion, a second fitting portion is formed. In the fitting part, a wedge-shaped convex projection with a large tip portion provided on one member penetrates through the film or sheet, penetrates through the through hole formed on the other member, and the tip portion is A film and sheet holding jig, which holds a film and sheets by being fixed and fitted so as to be caught in a through hole. 2. A mold to be fitted to a mold formed in a holding portion of a film or sheet to be held on the surface of the first member or the second member forming the gap portion according to claim 1. A jig for holding films and sheets, which is characterized by being provided. 3. A jig for holding a film or sheet, wherein the tip of the convex protrusion of the second fitting portion according to claim 1 is a wedge-shaped blade or needle. . 4. A jig for holding a film or a sheet according to claim 1, wherein the film or the sheet is a lens film for a projection screen.