JPH0946624A - Stretch support jig for film and sheet or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep application of a tension to a film/sheet or the like after fixing the film/sheet or the like by providing a fitting section fitting to an outer side face of an inner frame and an inner side face of an outer frame corresponding to the inner frame and using the inner frame and the outer frame to insert and fix the film/sheet or the like. SOLUTION: The jig is composed of a square inner frame 110 and a square outer frame 120, a linear Fresnel lens sheet 140 covers a front of the inner frame 110 and the outer frame 120 covers the sheet 140. A fitting recessed part 113 of the inner frame and a fitting projection 123 of the outer frame are fitted to fix the inner frame 110 and the outer frame 120. The lens sheet 140 is inserted between a tilt face 112 of the recessed part 111 of the inner frame and a projection 121 of the outer frame and supported surely. The inner frame 110 has a notch at the inner side or the outer side of four corners, opposite sides of the notch are tentatively adhered by an adhesives to reduce the frame size more in comparison with that before the adhesion. After the lens sheet 140 is inserted, extended and supported, the tentative adhesion of the notches at the four corners is exfoliated to allow an outer side of the inner frame 110 to apt to extend outward. Thus, the lens sheet 140 is further 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 films and sheets having no self-supporting property on a frame, and more particularly to a jig for stretching 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 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, 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 thin, non-self-supporting linear Fresnel lens film produced in this way is used for the projection screen, the stretching support method includes a rigid plate, for example, the first method of tying the lenticular lens sheet onto the film, and the film itself. A second method is known, in which the lens sheet is stretched while being supported by a support such as a frame or cabinet.
Considering the probability of occurrence of slack, the second method is superior. However, in the case of the method of stretching while supporting the film itself on the frame, it is difficult to securely fix it, and it is difficult to apply tension (tension) to the film without causing wrinkles or slack, so it is difficult to fix it. I needed a lot of tricks.

[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. , A simple extension support jig that can be securely fixed, can continue to apply tension (tension) without generating wrinkles or slack on the film, and does not require any tips for fixing It was wanted. The present invention, in such a situation,
It has a relatively simple structure for films and sheets such as linear Fresnel lens films that are continuously produced for projection screens, and can be securely fixed without causing wrinkles or slack in the films and sheets. The present invention intends to provide a spreading support jig which can be applied and which can continue to apply tension.

[0004]

Means for Solving the Problems A film and sheet spreading support jig of the present invention is a frame body composed of a quadrangular inner frame and an outer frame, and a film and sheets are provided in front of the inner frame. A jig for covering the film and sheets with the inner frame and the outer frame, and extending and supporting the films and sheets at least on two opposite sides of the frame body. A fitting portion for fitting with each other is provided on the inner side surface of the outer frame corresponding to, and the film and sheets are sandwiched and fixed by the inner frame and the outer frame. In, the front side of the side of the inner frame is provided with a concave portion having an inclined surface that is inclined toward the outside of the frame body, and the side of the outer frame is located at a position corresponding to the concave portion when the outer frame is covered with the inner frame. Protrusions (claw parts) are provided on the inner frame, and when the outer frame is covered with the inner frame, the protrusions of the outer frame should follow the inclined surface of the recess of the inner frame. When the film and sheets are stretched and stretched, and the outer frame covers the inner frame, the recess is fitted through the film and sheets, and the outer frame is inserted through the film and sheets. When covering and fitting, the inner frame is
Compared to a rectangular frame before adhesion, the opposite surfaces of the cutouts are temporarily adhered to each other with a rectangular frame provided with cutouts inside or outside the four corners (corners). It is formed with a small frame size. After the film and sheets are stretched and supported by the inner and outer frames,
The film and the sheets are further stretched by the restoring force that causes each side of the inner frame to expand toward the outer side of the frame due to temporary adhesion at the cut portion of the corner (corner part). It is a thing. Further, each side of the inner frame is directed toward the inner side of the frame body toward the front side, and the inner frame is provided with cutouts outside the four corners (corner portions). It is a thing. The projection (claw) of the outer frame is characterized by a material and a shape that a predetermined force or more is applied when the film and sheets are stretched and stretched. Further, the above-mentioned films and sheets are lens sheets 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 stretching member that can be securely fixed to the sheets without wrinkling or slack, and can be continuously tensioned. More specifically, the stretching support jig for films and sheets according to the present invention fits on the outer side surface of the inner frame and the inner side surface of the outer frame corresponding thereto at two opposite sides of the frame body that supports the stretching. By providing a fitting part that fits and fixing the film and sheets with the inner frame and the outer frame, the inner frame and the outer frame are securely fixed. , A concave portion having an inclined surface that is inclined toward the outside of the frame is provided, and a protrusion (a claw portion) is provided on a side of the outer frame at a position corresponding to the concave portion when the outer frame is covered with the inner frame. When the outer frame is covered with the frame, the projections of the outer frame are stretched along the inclined surface of the recess of the inner frame while the films and sheets are stretched, and when the outer frame is covered with the inner frame, By fitting with the recess, expansion and support are ensured when the outer frame is covered with the inner frame. Further, when the outer frame is covered with the film and the sheets through the inner frame, and the inner frame is fitted, the inner frame is cut into a rectangular frame having notches inside or outside the four corners (corners). Films, sheets and the like are formed by the inner frame and the outer frame because the opposing surfaces of the parts are temporarily adhered with an adhesive and the frame size is made smaller than the rectangular frame before adhesion. After being stretched and supported, the temporary adhesion can be made at the notches at the four corners (corners) of the inner frame. The films and sheets are further stretched by the restoring force of each side of the inner frame, which is generated by the temporary adhesion, to expand toward the outer side of the frame. Then, each side of the inner frame is directed toward the inner side of the frame body as it goes to the upper surface side, and the inner frame is provided with the cutouts on the outer sides of the four corners (corner portions). After supporting the film and sheets with the outer frame and the outer frame, the four corners of the inner frame (corner)
Each side of the inner frame that is generated by the temporary adhesion at the notch part of the frame tries to expand toward the outer side of the frame (restoration)
It ensures the expansion of films and sheets by force. In addition, the protrusions (claws) of the outer frame are made of a material and shape that a predetermined force or more is applied when the films and sheets are stretched and stretched, so that when the outer frame is covered with the inner frame. The expansion is made more reliable. Further, particularly, films and sheets are effective for expanding and supporting a lens sheet for a projection screen.

[0006]

EXAMPLES Examples of the film and sheet spreading and supporting jigs of the present invention will be described with reference to the drawings. First, the film and sheet spreading support jig of Example 1 will be described. FIG.
FIG. 1A is a plan view showing a state after completion of stretch support using a stretch support jig for films and sheets including the frame of the present embodiment, and FIG. a) A1-A
2 is a cross-sectional view of FIG. 2, FIG. 2 (a) is a plan view of an outer frame of the expansion supporting jig of this embodiment, and FIG. 2 (b) is a plan view of an inner frame.
FIG. 2C is a cross section taken along line B1-B2 of the inner frame shown in FIG. 1 and 2, 100 is a frame, 110 is an inner frame, 111 is a recess, 112 is an inclined surface, 113 is a fitting recess, 114 is a front part, 115 is a side part, 120 is an outer frame,
121 is a protrusion (claw), 123 is a fitting protrusion, 124 is a side surface, 130 is a fitting part, and 140 is a linear Fresnel lens sheet. As shown in FIG. 1, the spreading support jig for films and sheets according to this embodiment has an inner frame 110 and an outer frame 12.
It consists of 0 and a cabinet (not shown)
Front part 114 and side part 11 of the inner frame 110 fixed to
5 is covered with the outer frame 120 via the linear Fresnel lens sheet 140 to stretch and support the linear Fresnel lens sheet 140. Alternatively, the lens sheet is spread on the inner frame 110 and then fixed to the cabinet. The latter is better in terms of work efficiency.
As shown in FIG. 1, the inner frame 110 is covered with the outer frame 120 via the linear Fresnel lens sheet 140, and the fitting recess 1
The fitting convex portion 123 is fitted into the inner frame 110 and the outer frame 12
0 is fixed, but the linear Fresnel lens sheet 14
0 is the inclined surface 112 of the concave portion 111 of the inner frame 110 and the outer frame 12
It is sandwiched between the protrusions 121 of 0 and is reliably supported.

The four corners (corner portions) of the inner frame of the film and sheet spreading and supporting jig of this embodiment have a rectangular frame 110 having notches 160 on the outside as shown in FIG. 5 (a).
A is a surface 160A and 160B of the notch 160 which face each other.
2B, the size of the inner frame is reduced to the part indicated by the dotted line in FIG. 5A. 5A and 5B show only one corner (corner portion) of the rectangular frame 110A, and FIGS. 5A and 5B show E1-E2 of FIG. 3 is a schematic cross section in FIG. Therefore, by the operation shown in FIG. 3 (described later), after covering the inner frame with the outer frame, the provisional adhesive portions are separated from each other so that each side of the inner frame is
Generates a (restoring) force that tries to spread outward in the direction of 00,
As a result, the linear Fresnel lens sheet 140 can be further expanded and can be made free from wrinkles and slack. As shown in the cross section of FIG. 5A and FIG. 5B, the quadrangular frame 110A has a shape that faces the inside of the quadrangular frame 110A toward the upper surface 161 side.
As shown in FIG. 5A, the notches 160 are provided outside the four corners (corners) of the rectangular frame 110A, and the opposite surfaces 160A and 160B of the notches 160 are adhered and bonded to each other to form the four corners ( The corner portion) is pushed out to the inside of the rectangular frame 110A, so that the inner frame 110 having a size smaller than that of the rectangular frame 110A before being bonded is eventually formed.

In the present embodiment, the outer frame 120 and the projection (claw) 121 are both integral, and the inner frame is also integral and made of polypropylene.
May be made of ABS resin, and the protrusions (claws) 121 may be integrally formed of butadiene. As shown in FIG. 3B, the protruding portion (claw portion) 121 of the outer frame 120 is substantially orthogonal to the outer frame 120 and protrudes toward the corresponding inner frame side.
As shown in (c), the linear Fresnel lens sheet 14
Since a predetermined pressure or more is applied when 0 is sandwiched between the inner frame 120 and the inner frame 120, the inner frame 110 has a shape bent toward the outside of the frame along the inclined surface 112 of the inner frame 110 and pushes the linear Fresnel lens sheet 140. The material is not limited to this as long as the material can be continued. As described above, the outer frame 120
Polypropylene was used as the material, but the material is not particularly limited to this. Other examples include relatively hard materials such as ABS resin and polyvinyl chloride. Although polypropylene is used as the inner frame, the material is not particularly limited, but a material such as polyvinyl chloride is preferable.

Next, a cabinet or the like (not shown)
The linear Fresnel lens sheet 140 is placed on the upper surface of the inner frame 110 fixed to
An operation of covering the outer frame 120 and performing expansion support via the 40 will be described with reference to FIG. First, FIG.
A face 160A facing the notch 160 shown in FIG.
160B is an adhesive Konishi G for temporary adhesion
17 (manufactured by Konishi Bond Co., Ltd.) is bonded as shown in FIG. Note that opposing surfaces 160A of the notch portion 160, adhesives Konishi G17 used for bonding of 160B is not intended to adhere firmly, about 1 week,
After adhering, it gradually peels off. After this,
The ends of the linear Fresnel lens sheet 140 are bent at the two opposite sides of the inner frame 110 as shown in FIG. 6, and are adhered and fixed so that no wrinkles are formed. (FIG. 3 (a)) In this case, it is preferable that the adhesion can be firmly fixed in a short time and can be semi-permanently fixed. Next, the outer frame 120
When the inner frame 110 side is covered and the inner frame 110 side is moved, as shown in FIG.
1 holds the linear Fresnel lens sheet 140 on the inclined surface 112 of the inner frame 110 and stretches it while the outer frame 120
The fitting convex portion 123 moves along the side surface 115 of the inner frame 110 toward the fitting concave portion 113 side. Then, as shown in FIG. 3C, the fitting convex portion 123 is fitted to the fitting concave portion 113 side, and the movement of the outer frame 120 is stopped. By the above operation, the outer frame 120 is covered on the inner frame 110 side, and the fitting convex portion 123 is fitted on the fitting concave portion 113 side, whereby the initial expansion and supporting operation is completed. After that, with the passage of time, the facing surfaces 160A and 160B of the notched portion 160 of the inner frame 110 bonded by the adhesive material are gradually peeled off, and FIG.
A force acts to return to the state shown in (a). The linear Fresnel lens sheet 140 is further stretched by this (restoring) force that the four sides of the inner frame 110 try to expand toward the outside of the frame body 100. By this spreading operation,
The linear Fresnel lens sheet 140 finally becomes a state without wrinkles and slack.

Next, a stretching and supporting jig for films and sheets according to the second embodiment will be described. FIG. 4A is a plan view of an outer frame of a film and sheet spreading support jig of the present embodiment, FIG. 2A is a plan view of an inner frame, and FIG. Is Figure 2
2 is a cross section taken along line C1-C2 of the outer frame shown in FIG.
FIG. 2D is a cross section taken along line D1-D2 of the outer frame shown in FIG. In FIG. 4, 210 is an inner frame, 211 is a recess, 21
2 is an inclined surface, 213 is a fitting concave portion, 214 is a front surface portion, 21
5 is a side surface portion, 220 is an outer frame, 221 is a protruding portion (claw portion),
Reference numeral 223 is a fitting convex portion, 224 is a side surface portion, and 230 is a fitting portion. Like the first embodiment, the film and sheet spreading support jig of the present embodiment is also composed of the inner frame 210 and the outer frame 220. The front face portion 214 and the side face portion 215 of the inner frame 210 are also included.
The outer frame 220 is covered with the linear Fresnel lens sheet 140, and the linear Fresnel lens sheet 140 is stretched and supported. Also in this embodiment, as in the case of the first embodiment, the outer frame 220 is covered with the inner Fresnel lens sheet 140 via the linear Fresnel lens sheet 140, and the fitting projection 224 is fitted in the fitting recess 213 to form the inner frame. Although the outer frame is fixed, the linear Fresnel lens sheet 140 is securely supported by being sandwiched between the inclined surface 212 of the recess 211 of the inner frame 210 and the protrusion 121 of the outer frame 220. The procedure for stretching and supporting the linear Fresnel lens sheet 140 using the stretching supporting jig for films and sheets of this embodiment is the same as that in the first embodiment. Further, both the outer frame 220 and the projection (claw) 221 are integrally made of polypropylene, and the inner frame is also integrally made of polypropylene.

The four corners (corner portions) of the inner frame of the stretch supporting jig for films and sheets of this embodiment are rectangular frames 210 having notches 170 inside as shown in FIG. 5B.
A is a surface 170A, 170B facing each other of the cut portion 170.
4B, the size of the inner frame is reduced to the part indicated by the dotted line in FIG. 5B. 5 (b) (a) shows only one corner (corner portion) of the rectangular frame 110B, and FIG. 5 (b) (b) shows F1-F2 of FIG. 5 (b) (a). 3 is a schematic cross section in FIG. Therefore, as in the case of the first embodiment, after the outer frame is covered with the inner frame by the operation shown in FIG. 3, the provisional adhesive portions are separated from each other, so that each side of the inner frame moves toward the outside of the frame body. A force for expanding (restoring) is generated, and by this, the linear Fresnel lens sheet 140 can be further expanded, and a state without wrinkles or slack can be obtained. Since the rectangular frame 110B has the cross section shown in FIGS. 5B and 5B, a cut 1 is formed inside the four corners (corner portions) of the rectangular frame 210A as shown in FIG.
61, and the opposite surfaces 170 of the cut 161
By adhering and adhering A and 170B together, the four corners (corner portions) are pushed out inside the frame body, and as a result, an inner frame smaller in size than the rectangular frame 210A before adhering is formed.

As described above, in the present invention, the inner frame is made of a frame body having notches at four corners shown in FIG.
By temporarily bonding, the size of the inner frame is made smaller than the frame body before bonding, the outer frame is covered with the linear Fresnel lens sheet on the inner frame, and the inner and outer frames are fitted at the fitting part. After fixing and, the temporarily bonded surface is peeled off to utilize the force of returning to the state before the bonding, and is not particularly limited to the above-mentioned embodiment.
Further, in the above-mentioned embodiment, the case where one linear Fresnel lens sheet is stretched and supported has been described. However, also in the case where a plurality of films and sheets are stretched and supported, the film of this embodiment is similarly processed. It can be stretched and supported with a stretch support jig for sheets.

[0013]

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 drawing of a film and sheet stretching jig of Example 1.

FIG. 2 is a diagram of an outer frame and an inner frame of the film and sheet spreading jig of Example 1.

FIG. 3 is a diagram for explaining a stretching operation in a cross section of a main part of a stretching jig for films and sheets of Example 1.

FIG. 4 is a diagram of an outer frame and an inner frame of a film and sheet spreading jig of Example 2.

FIG. 5 is a diagram for explaining four corners (corner portions) of the inner frame of the embodiment.

FIG. 6 is a diagram illustrating a method of adhering films and sheets to an inner frame in the spreading and supporting operation of the present invention.

[Explanation of symbols]

100 Frame 110, 210 Inner Frame 111, 211 Recess 112, 212 Inclined Surface 113, 213 Fitting Recess 114, 214 Front Part 115, 215 Side Part 120, 220 Outer Frame 121, 221 Protrusion (Claw) 123, 223 Fitting convex portion 124, 224 Side surface portion 130 Fitting portion 140 Linear Fresnel lens sheet 110A, 210A Square frame 160 Cut portion 160A, 160B (cut portion) surface 161 Front surface 170 cut portion 170A, 170B (cut portion) surface

Claims (4)

[Claims] 1. A frame body comprising a quadrangular inner frame and an outer frame, wherein an outer frame is covered on the front surface of the inner frame via films and sheets, and the films and sheets are inner frame and outer frame. A fitting part for extending and supporting at least two opposing sides of the frame body while sandwiching between the fitting part, which fits to the outer surface of the inner frame and the inner surface of the outer frame corresponding thereto. The inner frame and the outer frame sandwich and fix the film and sheets, and the two front sides of the inner frame are inclined toward the outside of the frame body on the two opposite sides of the frame body to be stretched and supported. A concave portion having an inclined surface is provided, and a protrusion is provided on a side of the outer frame at a position corresponding to the concave portion when the outer frame is covered with the inner frame, and when the outer frame is covered with the inner frame, The projection of the outer frame extends along the inclined surface of the concave part of the inner frame, and stretches the film and sheets, and when the outer frame covers the inner frame, the concave part When the inner frame is fitted with the inner frame through the film and the sheets, and the outer frame is covered with the inner frame through the films and the sheets, the inner frame is provided with notches on the inside or outside of the four corners. It is formed by temporarily adhering the opposite surfaces of the cut portion to each other with an adhesive to a rectangular frame, and making the frame size smaller than the rectangular frame before bonding. After the film and sheets are stretched and supported by the frame, each side of the inner frame is expanded due to the temporary adhesion at the notches at the four corners of the inner frame. A film and sheet spreading support jig, wherein the film and sheets are further spread. 2. The inner frame according to claim 1, wherein each side faces toward the front side toward the inside of the frame body, and the inner frame is provided with cutouts on the outer sides of the four corners. Characteristic film and sheet extension support jig. 3. The film according to claim 1, wherein the protrusion of the outer frame is made of a material and a shape that a predetermined force or more is applied when the film or the sheet is sandwiched and stretched. , A support jig for spreading sheets. 4. A spreading support jig, wherein the film or sheet according to any one of claims 1 to 3 is a lens sheet for a projection screen.