JPH0740995Y2 - Transmissive screen - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a transmissive screen used in a rear projection type image system, and more particularly to a transmissive screen having a deformation correction mechanism for correcting deformation of a lens sheet. It is about.

[Conventional technology]

4 to 6 are views showing a conventional example of a transmission screen, FIG. 4 is an overall view, FIG. 5 is a view showing a simple fixed support side, and FIG. 6 is a movable tension support. It is the figure which showed the side.

The transmissive screen 1 is composed of a lens sheet 2 in which one or more lens sheets are combined, and a support 3 which supports the lens sheet 2 on the outer circumference.
Since the lens sheet 2 is thin relative to its size, it is difficult to make it stand alone with the lens sheet 2, and therefore it is necessary to support it with the support 3.

The lens sheet 2 is made of acrylic, and the flange portions 22 and 2 with acrylic rods attached to the outer periphery are also used.
3 is formed. Flange part 22 provided on the upper side
Is simply fixedly supported by the support 3 (FIG. 5), and the flange portion 23 provided on the lower side is supported by the support 3 in a movable tension (FIG. 6).

As shown in FIG. 5, the support 3 has a square pipe-shaped support body 31, a crank-shaped stopper 37, and screws on the upper side.
39 and two stoppers from both sides of the flange 22
It is clamped with 37, and its stopper 37 is screwed to the support body 31.
And the lens sheet 2 is fixedly supported.

On the lower side, as shown in FIG. 6, the support main body 31, the L-shaped guide plate 38, and the screw 39 are provided, and two guide plates 38 are provided.
The guide portion is fixed to the support body 31 with screws 39 so that the guide surfaces thereof are parallel to each other, and the flange portion 23 of the lens sheet 2 is movably held between the two guide plates 38.

The tension mechanism 5 is provided on the lower support body 31. This is to prevent the lens sheet 2 from expanding and contracting due to changes in environmental temperature and humidity, and causing deformation, wrinkles, floating, etc., and to apply outward tension to the lens sheet 2. Thus, the expansion and contraction of the lens sheet 2 is absorbed.

The tension mechanism 5 includes a coil spring 51, a bolt 52 and a nut.
53, the coil spring 51 is inserted into the head of the bolt 52, and is inserted from the mounting hole 54 provided in the support body 31,
A through hole provided in the support body 31 is passed through from the lower side, a through hole of the flange portion 23 is further passed, and the screw side of the bolt 52 is tightened and fixed by a nut 53.

7 to 10 are views showing a mounting structure of a conventional transmissive screen, and FIG. 11 is a diagram for explaining a modification of a support used in the conventional transmissive screen.

7 to 11, 2 is a lens sheet, 3 is a support, 6 is a structural frame on the building side, 61 and 63 are mounting bolts, and 62 and 64 are mounting nuts.

Conventionally, a large size transmissive screen is often attached to a building or the like. At that time, four sides of the outer periphery of the support body 3 are attached to the building-side structural frame 6 provided in the building by mounting bolts 6.
1, mounting from the optical axis direction using the mounting nut 62 (Figs. 7 and 8), or mounting the upper side of the support 3 from the vertical direction using the mounting bolt 63 and mounting nut 64, and the remaining 3 sides Was mounted using the mounting bolts 61 and the mounting nuts 62 in the same manner as described above (Figs. 9 and 10).

[Problems to be solved by the device]

At this time, if the building-side structural frame 6 is distorted or the mounting accuracy for mounting the support body 3 on the building-side structural frame 6 is low, the support body 3 will be attached to the support body 3 as shown in FIG. 11 (a). The center portion is bent, or as shown in FIG. 3B, the support body 3 is deformed with respect to the mounting reference plane S such as waviness. When the support body 3 is deformed, the flange portion 22 is fixed to the support body 31 as shown in FIG. 5, so that the support body 3 is deformed to the lens sheet 2 through the flange portion 22. The lens sheet 2 was deformed, wrinkled, and floated. Therefore, the conventional transmissive screen has a problem that not only the appearance is impaired, but also resolution deterioration and color unevenness are likely to occur.

On the other hand, in the case where the transmissive screen is attached to a building, it is necessary to preliminarily produce a highly accurate building-side structural frame 6 without distortion, and the support 3 is attached to the building-side structural frame 6
There is also a problem that it requires a lot of time and cost because it needs to be accurately attached to.

An object of the present invention is to solve the above-mentioned problems and to prevent the deformation, wrinkles, and floating of the lens sheet even when the support body is deformed due to the distortion of the building-side structural frame and the low mounting accuracy of the support body. It is possible to provide a transmissive screen that can reduce the time and cost required for installation in a building or the like.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, the invention of claim 1 provides a lens sheet having a flange portion on an outer peripheral portion, and one set of the lens sheet or two sets of flange portions provided on two opposite sides of the lens sheet. A fixed type support for fixedly supporting one flange part and a support having a movable side support part for movably supporting the other opposite flange part, wherein a fixed side support of the support is provided. And a holding member having a L-shaped cross section and an inverted L-shaped cross section, each of which has a bent portion facing inward, and screwed into each bent portion of each of the holding members to fix the lens sheet on the fixed side. The present invention is characterized in that a plurality of deformation correction mechanisms, each of which is composed of a correction screw member for finely adjusting the position of the flange portion and which corrects the deformation of the support, are provided in the side direction.

According to a second aspect of the present invention, in the transmission screen according to the first aspect, the lens sheet includes a combined first and second lens sheet, and the holding member having the L-shaped cross section and the inverted L-shaped cross section. Are provided so as to cover the fixed-side flange portions of the first and second lens sheets, respectively, and the correction screw member is screwed into each bent portion of each holding member, The fixing positions of the flange portions are finely adjusted by pressing the fixed flange portions of the first and second lens sheets outward.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the drawings and the like.

1 to 3 are views showing an embodiment of a transmissive screen according to the present invention. FIG. 1 is a general view, and FIG.
FIG. 3 is a view showing a deformation correction mechanism used in the screen of the embodiment, and FIG. 3 is a view showing a movable tension support side of the screen of the embodiment.

In addition, the same reference numerals are given to the portions having the same functions as those of the above-described conventional example, and the description thereof will be omitted.

The transmissive screen 1 of this embodiment is a combination of two lens sheets 2 and has a screen size of 150 inches.

As shown in FIG. 2, the support body 3 has a support body 31 of 75 mm square pipes and a steel material 32 of 16 mm thickness and 50 mm width on the upper side.
And a steel material 33 having a thickness of 8 mm and a width of 30 mm and a bolt 35.

In the support body 31, a steel material 32 and a steel material 33 are combined in an L shape and an inverted L shape in cross section so that the flange portion 21 is movably sandwiched. The steel materials 32 and 33 are supported by a bolt 35. It is fixed to the body 31. The deformation correction mechanism 4 is attached to the steel material 33.

The deformation correcting mechanism 4 includes a rubber sheet 41 having a thickness of 2 mm, a thin steel material 42 having a thickness of 6 mm, and a deformation correcting bolt 43 having an outer diameter of a male screw of 5 mm (M5).
The rubber sheet 41 is provided so as to contact the flange portion 21. The deformation correction mechanism 4 does not directly press the flange portion 21 with the deformation correction bolts 43, but indirectly presses the flange portion 21 via the thin steel material 42 and the rubber sheet 41. The rubber sheet 41 is provided to prevent displacement and impact absorption and to prevent the deformation correcting bolt 43 from loosening, and the thin steel material 42 is provided to prevent damage to the flange portion 21 and the rubber sheet 41. This is for smoothly transmitting the displacement of the deformation correcting bolt 43 to the flange portion 21.
In this embodiment, the deformation correction mechanism 4 is attached to the support 3 by 15
The pitch is 0 mm.

Since such a deformation correction mechanism 4 is provided on the support body 3, when the transmissive screen 1 is attached to a building, the support body 3 is used.
Even if the lens sheet 2 is deformed, the deformation of the support body 3 is not transmitted to the flange portion 21 by finely adjusting the position of the flange portion 21 with the deformation correcting bolt 43. Occurrence can be suppressed.

As shown in FIG. 3, the support body 3 is composed of a support body 31 of a 75 mm square pipe, a guide plate 34 made of steel material having a thickness of 16 mm and a width of 65 mm, and a bolt 35, as shown in FIG. There is.

The guide plate 34 is fixed to the support body 31 by bolts 35 so that the guide surfaces thereof are parallel to each other, and the flange portion 23 of the lens sheet 2 is movably held between the two guide plates 34. ing. This guide plate 34 is a conventional guide plate 38.
Since the parallelism is improved as compared with the case of FIG. 6, the sliding movement of the flange portion 23 becomes smoother and more accurate.

A tension mechanism 5 similar to that shown in FIG. 6 is provided inside the lower support body 31 to prevent the lens sheet 2 from being deformed or wrinkled or lifted due to changes in environmental temperature and humidity. . In the present invention, since the deformation correction mechanism 4 is provided, it is possible to correct the deformation of the upper part of the lens sheet 2 which could not be removed by the tension mechanism 5 in the past.
Further, in the deformation correction mechanism 4, when the tension mechanism 5 applies an appropriate tension in the opposite direction, the structure becomes simpler and the correction operation is easier.

Various modifications can be made without being restricted to the embodiments described above.

In this embodiment, the steel material to which the deformation correcting mechanism is attached is fixed to the support body with the mounting bolts.However, when the thickness of the support body is thin, the steel plate is fixed to the support body by welding or screwing, A deformation correction mechanism may be attached to the steel plate. Further, although this steel material is a combination of two steel materials, one steel material processed into an L shape may be used.

In this embodiment, the tension is applied in the vertical direction, but it is possible to apply the tension not only in the vertical direction but also in the horizontal direction or simultaneously in the vertical and horizontal directions, two sheets together or one sheet in different directions.

The tension mechanism is not limited to the spring type, and the type in which the weight is suspended can be similarly applied.

The present invention is applicable to a lens sheet having a one-sheet structure or three or more lens sheets, not limited to the two-sheet structure.

[Effect of device]

As described in detail above, the transmissive screen according to the present invention is provided with the deformation correcting mechanism for correcting the deformation of the lens sheet by finely adjusting the position of the flange portion on the simple fixed support side of the support.

Therefore, when the transmissive screen is attached to a building, even if the support is deformed due to the distortion of the structural frame on the building side or the low mounting accuracy of the support, the lens sheet is finely adjusted by adjusting the position of the flange portion. Since it is possible to suppress the deformation, wrinkles, and floating of the screen, it is possible to prevent the deterioration of resolution and the occurrence of color unevenness without impairing the appearance of the transmissive screen.

Further, as compared with the conventional case, the precision required for the work for manufacturing the building-side structural frame and the work for mounting the support may be low, so that time and cost can be reduced.

[Brief description of drawings]

1 to 3 are views showing an embodiment of a transmissive screen according to the present invention. FIG. 1 is a general view, and FIG.
FIG. 3 is a view showing a deformation correction mechanism used in the screen of the embodiment, and FIG. 3 is a view showing a movable tension support side of the screen of the embodiment. 4 to 6 are views showing a conventional example of a transmission screen, FIG. 4 is an overall view, FIG. 5 is a view showing a simple fixed support side, and FIG. 6 is a movable tension support. It is the figure which showed the side. FIG. 7 to FIG. 11 are views showing a conventional transmission type screen mounting structure, and FIG. 7 and FIG.
FIG. 10 and FIG. 10 are cross-sectional views, and FIG. 11 is a view for explaining a support used in the screen. 1 ... Transmissive screen 2 ... Lens sheet 21,22,23 ... Flange part 3 ... Support body 31 ... Support body 32, 33, 34 ... Steel material, 35 ... Bolt 4 ... Deformation correction mechanism 41 ... Rubber sheet, 42 ... Thin Shaped steel 43 ... Deformation compensation bolt 5 ... Tension mechanism 51 ... Coil spring 52 ... Bolt, 53 ... Nut 6 ... Building side structural frame 61, 63 ... Mounting bolt 62, 64 ... Mounting nut S ... Mounting reference plane

Claims (2)

[Scope of utility model registration request] 1. A lens sheet having a flange portion provided on the outer periphery thereof, and one of the flange portions provided on two opposite sides of one or two sets of the lens sheet is fixedly supported. A fixed-side support portion and a support body having a movable-side support portion that movably supports the other opposing flange portion, the transmission-type screen being provided on the fixed-side support portion of the support body, and the bent portions are respectively A holding member having an inward L-shaped cross section and an inverted L-shaped cross section, and a correction member that is screwed into each bent portion of each holding member to finely adjust the position of the flange portion on the fixed side of the lens sheet. A transmissive screen comprising a plurality of deformation correction mechanisms, each of which includes a screw member, for correcting the deformation of the support in the lateral direction. 2. The transmissive screen according to claim 1, wherein the lens sheet is composed of a combined first and second lens sheet, and the holding member having an L-shaped cross section and an inverted L-shaped cross section is formed by: The correction screw members are provided so as to cover the fixed-side flange portions of the first and second lens sheets, respectively, and the correction screw member is screwed into each of the bent portions of each of the holding members. A transmissive screen characterized in that the fixing positions of these fixed flanges of the second lens sheet are finely adjusted by pressing the fixed flanges outward.