JPH07319071A - Device for fixing screen doubly - Google Patents

Abstract

PURPOSE:To minimize the width of a no-image band created by a screen frame and to enhance the reliability of locking a screen in position by using as one side of the screen a movable frame which is rotated about an axis parallel to the side of the screen, and pressurizing the movable frame using an elastic body. CONSTITUTION:A screen unit has a screen 6 with the left outer edge of the screen 6 securely locked in the grooved portion 17 of a vertical fixed frame and the right outer edge of the screen 6 locked in the groove of a vertical movable frame so that the right-direction side of the right outer edge is locked in place by a first spring 30 in such a way as to be capable of being displaced elastically, the vertical moving frame having a round hole 18 which rotatably engages with a frame shaft 31 that is rotatable about an axis parallel to the right side. Similarly, the lower outer edge of the screen 6 is locked in the groove of a horizontal fixed shaft 11 and the upper- direction side of the upper outer edge of the screen is locked to the horizontal movable frame in such a way as to be capable of being displaced. As a result, the screen 6 is locked in position in such a way as to freely expand and retract rightwards and upwards with respect to the screen frame 16. A joint width can then be held constant even with temperature and humidity variations at the site of installation, thus making an image easy to view.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen double fixing device for minimizing joints of a multi-vision screen and fixing the screen with high reliability.

[0002]

2. Description of the Related Art In conventional multi-vision, image information projected from a plurality of projection units is enlarged and projected on the back of a screen composed of a plurality of screens to display a large-screen composite image on the screen. ing.

When the displayed image has a large screen, the area of the screen is inevitably increased, and it is necessary to form the entire screen with a single sheet member. It becomes difficult from the viewpoint of production equipment.

Therefore, in a multi-vision screen for a large screen, the front faces of a plurality of screens are aligned,
Connects adjacent screens to each other (screen frame)
It is generally formed by inserting it into the groove of the above and fixing it and then combining.

An example of a screen device in which a plurality of screens of this type are combined is, for example, Ukaikaihei 3-9018.
There is a multi-screen device disclosed in Japanese Patent No. 4 publication.

In this known example, a plurality of screens are provided side by side, and one large-screen screen is formed by inserting the ends of the screens into the grooves of the screen connector (screen frame) located between the adjacent screens. It is designed to be configured.

In this known example, in order to make the connecting tool (screen frame) inconspicuous, the connecting tool (screen frame) is formed of a light diffusing material and the amount of light transmission is set to an appropriate value. Was doing.

[0008]

In the known prior art of the above-mentioned multi-screen device, the connection tool (screen frame) is so connected that the light transmission amount thereof is approximately the average light quantity at the edge of the adjacent screen. The light transmittance of (screen frame) and its shape were devised, and the connection tool (screen frame)
To make it inconspicuous.

However, if the width of the non-video band formed by the connecting tool (screen frame) is set to a certain amount or less, the width of the connecting tool (screen frame) must be set to a certain amount or less. Even if a rigid material such as metal is used as the material for the screen frame, the length of the connector (screen frame) is long and bends due to its own weight, and linearity is maintained due to variations in the manufacturing process. As a result, the width of the non-video band due to the connector (screen frame) cannot be reduced to a certain amount or less.

Further, in a core unit stacked type multi-vision in which a projection unit and a screen unit are housed in one housing, a single screen is provided with a screen frame having a narrow groove in which the longitudinal directions of the sides of the screen are the same. The outer edge portion of the screen alone is inserted into and fixed to the groove, and the core unit is formed by stacking a plurality of screen units vertically and horizontally on the front surface of the screen unit.

For this reason, adjacent screen frames have a gap due to the mechanical dimensional variation of the core unit, and as a result, the width of the non-image band due to the connector (screen frame) becomes wide, and it is possible to reduce the width to a certain amount or less. Disappear.

However, the smaller the width of the non-image band by the connection tool (screen frame), the less reliable the screen is locked, but the higher the display quality of the multi-vision image, the more the screen is displayed. The reliability of locking is improved, but there is a contradiction that deteriorates the display quality of multi-vision images.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to minimize the width of a non-image band by the connecting device (screen frame) of the screen, and An object is to provide a device that improves the reliability of locking.

(In order to simplify the description below, the connecting tools are collectively referred to as a screen frame, the non-video band of the connecting tool (screen frame) is referred to as a joint, and the non-video band of the connecting tool (screen frame) is referred to as a joint. The width is referred to as joint width.)

[0015]

In order to achieve the above object, the screen double fixing device according to the present invention has a structure in which the screen is fixed by the following means.

1. The outer peripheral portion of the screen is brought into contact with the groove of the screen frame parallel to the side of the screen, and one frame of the opposite side is a fixed frame that statically holds the screen, and the other one is fixed. The movable frame is configured to rotate about an axis parallel to the side of the screen, and the movable frame is pressed by the first elastic body or the first viscoelastic member in the locking direction of the screen.

2. The movable frame and the fixed frame are a second elastic body,
Or and comprising a second viscoelastic body, a second elastic body,
The second viscoelastic body presses the screen with a stronger force than the first elastic body and the first viscoelastic body to minimize the gap between the screen frames of the adjacent core units.

3. The movable frame and the fixed frame, the second elastic body, or a portion of the second viscoelastic body that engages with the screen is provided with a plurality of ridge-width protruding pieces. .

[0019]

1. The outer peripheral portion of the screen is fixed while being pressed by the first elastic body or the first viscoelastic body, so that the joint width can be reduced even if the amount applied to the screen is reduced. It can be fixed, and even if the surrounding temperature and humidity change and the screen expands and contracts, the elastic body and viscoelastic body pressurize it, and as the screen expands and contracts, the outer edge of the screen can be locked and the joint width can be fixed. Can be reduced.

2. In a multi-vision system in which core units are stacked, since the gap between the screen frames of adjacent core units can be minimized, the joint width can be further reduced.

3. Since the plurality of projecting pieces are provided on the front surfaces of the movable frame and the fixed frame which engage with the screen, the screen is more stably fixed to the frame.

[0022]

An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing the appearance of the multi-vision system according to the first embodiment of the present invention, FIG. 2 is a schematic cross-sectional view taken along the line A--A of FIG. 1, and FIG. Fig. 4 is a schematic cross-sectional view taken along line B, and Figs. 4 and 5 are views showing the operation of the screen and the screen frame according to the temperature and humidity changes of the screen double fixing device in the multi-vision of the first embodiment of the present invention. , Which corresponds to FIG. 2 of the previous figure, and FIG. 6 shows CC of FIGS.
FIG. 7 is a schematic view of a cross section taken along a line, and FIG. 7 is a view showing an operation of the screen double fixing device against deformation of a structure when stacked as a multi-vision which is an essential part of the present invention.
It corresponds to FIG. 6 of the previous figure.

In each drawing, 101 is a machivision, 1 is a core unit, 2 is a screen unit, 3 is a projection unit, 4 is a housing, 6 is a screen, 7 is a storage case, 8 is a set of lenses, and 10 is vertical. A fixed frame, 11 is a horizontal fixed frame, 12 is a vertically movable frame, 13 is a horizontally movable frame, and 16 is a screen frame.

Reference numeral 17 denotes a vertical fixed frame 10, a horizontal fixed frame 11,
The vertical movable frame 12 and the horizontal movable frame 13 are respectively provided with groove portions, 18 is a vertical hole provided in each of the vertical movable frame 12 and the horizontal movable frame 13, 21 is a lenticular sheet, and 22 is a Fresnel lens. Sheet showing 25
Is an inner frame, 30 is a first spring, 31 is a frame shaft, 32 is an E ring, 35 is a movable frame bearing, and 36 is a bearing spring.

M indicates the locking amount of the outer edge of the screen 6 of the horizontal movable frame 13 and the horizontal fixed frame 11, and H indicates the horizontal movable frame 13 and the horizontal fixed frame of the screen unit 2 which vertically overlap when assembled as a multi-vision. 11 indicates a gap between the rear sides of the robot, and N is a vertically movable frame 12 and a vertically fixed frame 10.
Shows the amount of locking of the outer edge of the screen 6, S shows the gap between the vertically movable frame 12 and the vertically fixed frame 10 on the right and left adjacent to each other when assembled as a multi-vision, and a is the projection The image light from the unit 3 is shown.

In FIGS. 1, 2 and 3, the multi-vision 101 of the first embodiment of the present invention corresponds to the screen unit 2 in a one-to-one correspondence with a set in which the front faces of the screen unit 2 are aligned and stacked vertically and horizontally. Align the front of the projection unit 3 that projects light
It is arranged on the rear surface of the set of the screen units 2, the middle of the set of the screen units 2 and the set of the projection units 3 is shielded by the housing 4, and the image light of the projection units 2 is rear-projected to the screen units 2. One set of the screen unit 2, one projection unit 3 and one housing 4 is defined as a core unit 1.

The screen 6 is the lenticular sheet 2
The screen unit 2 is formed by overlapping the Fresnel lens sheet 22 with its outer shape aligned on the front surface, and the screen unit 2 locks the outer edge of the left side of the screen 6 in a groove 17 having the vertical direction of the vertical fixed frame 10 as the longitudinal direction. A vertically movable frame having a round hole 18 that is fixedly locked in the left direction by an outer peripheral portion of the right side of the screen 6 and that is rotatably engaged with a frame shaft 31 rotatable about an axis parallel to the right side. The first spring 3 is locked by engaging with the groove having the vertical direction of 12 as the longitudinal direction.
0 is elastically displaceably locked in the right direction, and the lower outer edge of the screen 6 is supported in the downward direction by being locked in a groove whose horizontal direction is the horizontal direction of the horizontal fixing frame 11. A horizontal movable frame 1 is provided with a frame shaft 31 which is rotatable around an axis parallel to the upper side at the outer edge of the upper side of 6.
The vertical fixing frame 10 and the horizontal fixing frame 11 are rotatably displaceably locked by the first spring 30 in the upper direction by being locked in a groove having the vertical direction of 3 as a longitudinal direction. Is fixedly engaged with the screen frame 16,
The vertically movable frame 12 and the horizontally movable frame 13 are elastically displaceably engaged with the screen frame 16, and as a result, the screen 6 is telescopically locked with respect to the screen frame 16 in the upward and rightward directions. To be done.

In this state, the spring force for pressing the screen 6 of the first spring 30 is of course such that the screen 6 does not buckle, and the vertical fixing frame 10 and the horizontal fixing are fixed. The frame 11, the vertically movable frame 12 and the horizontally movable frame 13 connect the screen 6 to the temperature of the installation environment,
The groove portion 17 may be narrowed so as not to come off due to expansion and contraction or vibration due to changes in humidity and atmospheric pressure, or the groove portion 17 may be padded with an elastic or viscoelastic body such as a spring or rubber.

The projection unit 3 is composed of a set 8 of lenses, a projection device, other electronic parts and mechanical parts (not shown), and the light beam of the image projected from the cathode ray tube is expanded by the set 8 of lenses to the screen 6. It is rear-projected.

In the multi-vision having the above-mentioned structure, the horizontal movable frame 13 and the horizontal fixed frame 1 of each screen unit 2 at the maximum temperature and the maximum humidity during the actual operation at the installation site.
1 rear clearance gap H, vertically movable frame 12 and vertically fixed frame 1
The dimensions of the screen 6 and the frames 10, 11, 12, and 13 are set so that the gap S between the rear faces of 0 becomes 0, while the image information projected from the projection unit 3, that is, the range of the image light a, is the above. The outer shape of the screen 6 is adjusted so as to be projected.

Next, referring to FIGS. 4 and 5, the joint width of the screen unit 1 can be kept small when the temperature and humidity at the installation site are changed by using concrete numerical values in the state assembled as the multi-vision having the above-mentioned configuration. The operation will be described.

The horizontal fixed frame 11 and the horizontally movable frame 13 of each screen unit 2 are engaged with the screen 6 by the amount of locking M of the screen 6.
The screen 6 locking amount N of the vertically fixed frame 10 and the vertically movable frame 12 is such that the engagement amount of the screen is 1 mm and a steel plate having a plate thickness of 0.6 mm has been used.

[0034]

## EQU1 ## M = N = 1 + 0.6 = 1.6 (mm) The joint width is 2M = 2N = 2 × 1.6 = 3.2 (mm).

This value is, as shown in FIG. 4, the vertical movable frame 12 and the vertical fixed frame 1 of each screen unit 2 at the maximum temperature and the maximum humidity during the actual operation at the installation site.
0 rear gap H, horizontally movable frame 13 and horizontally fixed frame 1
Since the dimensions of the screen 6 and the frames 10, 11, 12, and 13 are set so that the clearance S between the rear surfaces of 1 is 0, air conditioning works, and as shown in FIG. The joint width of 2M = 2N = 3.2mm cannot be maintained.

However, in the state shown in FIG. 4, the maximum temperature is 35 ° C. and the maximum humidity is 80%, the temperature in the standard state shown in FIG. 5 is 25 ° C., the humidity is 55%, and the horizontal direction of the screen 6 is set. When the length is 880 mm, the expansion amount is numerically calculated by the expansion coefficient of the screen 6 as follows.

[0037]

## EQU00002 ## 1. Shrinkage amount due to temperature change in the horizontal direction of the screen 6:
0.6mm 2, shrinkage due to horizontal humidity change of screen 6:
1.0 mm 3, the gap S between the rear surfaces of the horizontally movable frame 13 and the horizontally fixed frame 11 is S = 0.6 + 1.0 (mm) = 1.6 (mm), and as a result, the joint width on both sides is 2M + S = 3. 2 + 1.6 (mm) = 4.8 (mm) Joint width on one side is 4.8 / 2 (mm) = 2.4 (m
m) and the joint width increases from the previous value, but a smaller joint width can be maintained.

If the temperature and humidity at the time of actual operation at the installation site change remarkably, the screen 6 expands and contracts remarkably and the gaps S and H also increase to increase the joint width accordingly.

However, the probability of seeing a large image in the state where the temperature rises and falls remarkably is low in the first place, and the air conditioning operates,
Actually, the values of S and H can be set to less than 1.6 mm, and the joint width can be further reduced.

A method for making the values of S and H zero will be described separately in the second embodiment.

In FIGS. 6 and 7, the screen frame 1
6, the movable shaft 31 and the movable bearing 35, which are provided on the inner side of the upper side and the inner side of the right side of the inner frame 25, are penetrated through the round holes 18a and 18b and pressed toward the left side in the drawing through the bearing spring 36, The vertically movable frame 12 and the horizontally movable frame 13 are rotatably engaged with each other around a movable shaft 31, and the round holes 18a and 18b and the movable shaft, and the movable shaft 31 and the movable bearing 35 have a gap V1 in the radial direction, respectively. V2 is provided, and the moving amount U is provided in the left direction in the drawing while being pressed by the bearing spring.

As shown in FIG. 7, the screen double fixing device having the above structure is deformed by the weight of the upper screen unit 2 in a state where the screen units 2 are stacked as a multi-vision, and the screen frame 16 and the inner frame are deformed. Even if 25 bends downward, the movable bearing 3
5 and the lateral clearance U of the movable shaft, the vertical movable frame 12 and the horizontal movable frame 13 do not depend on the pressing force of the bearing spring 36 and only move on the movable shaft 31 to rotate. Rotates without being blocked, and the groove portion 17 of the outer edge portion of the screen 6 is surely locked by the pressing force of the first spring 30.

The second embodiment of the present invention in which the values of S and H described above are set to zero will be described below with reference to the drawings.

FIG. 8 is a perspective view including a partial cross-sectional view of a single screen unit 2 of multivision according to the second embodiment of the present invention as seen from the front, and FIG. 9 is taken along line D-D of FIG. Fig. 10 shows a schematic view of a cross section along and corresponds to Fig. 2 above,
Is an enlarged view of part B of FIG. 9, showing the operations of the screen 6, the vertically movable frame 12, and the horizontally movable frame 13 due to changes in temperature and humidity,
12 and 13 show an application example of the second spring of the second embodiment of the present invention, and FIG. 14 shows an application example of using a viscoelastic member for the second spring of the second embodiment of the present invention. Here is an example:

In each drawing, the same parts as those in the previous drawings are designated by the same reference numerals, and the other reference numerals 40 are second springs, 41 is a rivet, 42 is a web spring, 43 is a line spring, and 45 is rubber. Show.

In FIGS. 8 and 9, the screen unit 2 is fixed in the left direction by engaging the outer edge of the left side of the screen 6 with the groove 17 having the vertical direction as the longitudinal direction, as in the first embodiment. The outer peripheral portion of the lower side of the screen 6 is supported in the downward direction by being locked in a groove whose horizontal direction is the horizontal direction of the horizontal fixing frame 11.

The screen 6 of the screen unit 2
The outer edge of the upper side is locked in a groove whose horizontal direction is the horizontal direction of the horizontal movable frame 13 having a round hole 18 which is rotatably engaged with a frame shaft 31 rotatable about an axis parallel to the upper side. By doing so, the first spring 30 is elastically displaceably locked in the upward direction. The difference from the first embodiment is that the fixed end of the second spring 40 is fixed to the first spring 30. Rivets 41, and the free end is formed as a groove 17 to press the outer edge of the upper side of the screen 6 downward with a force corresponding to the amount of elastic deformation. Set it higher than 30, and in the result the horizontal movable frame 1 by the second spring
3 rotates in the upward direction of the screen 6 in the drawing, and the rear surfaces of the horizontally fixed frames 11 of the vertically adjacent screen units 2 are in contact with each other, and the rotation amount of the horizontal movable frame 13 is the screen 6.
It is needless to say that the locking amount M is set in a range in which the upper end face does not protrude from the groove portion 17 of the horizontal movable frame 13.

The screen 6 of the screen unit 2
The outer edge of the right side of the vertical movable frame 12 having a round hole 18 rotatably engaged with a frame shaft 31 rotatable about an axis parallel to the right side is locked in a groove having the vertical direction as the longitudinal direction. By doing so, the first spring 30 is elastically displaceably locked in the upward direction. The difference from the first embodiment is that the fixed end of the second spring 40 is fixed to the first spring 30. To the left edge of the screen 6 by a force corresponding to the amount of elastic deformation, the free end is formed as the groove portion 17 by engaging the rivet 41 with the first spring. The setting is stronger than 30, and in the result, the vertical movable frame 1 is set by the second spring.
2 is rotated rightward of the screen 6 in the figure, and is brought into contact with the rear faces of the vertical fixed frames 11 of the adjacent screen units 2 on the right side. The vertical movable frame 12 is rotated by the upper end face of the screen 6. It goes without saying that the locking amount N is set in a range that does not protrude from the groove portion 17 of the vertically movable frame 12.

Next, referring to FIGS. 10 and 11, in the assembled state as the multi-vision having the above-mentioned configuration,
The operation of keeping the joint width of the screen unit 1 small when the temperature and humidity at the installation site change will be described using specific numerical values.

The horizontal fixed frame 11 and the horizontally movable frame 13 of each screen unit 2 have the screen 6 locking amount M,
The screen 6 locking amount N of the vertically fixed frame 10 and the vertically movable frame 12 is such that the engagement amount of the screen is 1 mm and a steel plate having a plate thickness of 0.6 mm has been used.

[0051]

## EQU3 ## M = N = 1 + 0.6 = 1.6 (mm) The joint width is 2M = 2N = 2 × 1.6 = 3.2 (mm).

As shown in FIGS. 10 and 11, this value is the gap between the vertically movable frame 12 and the vertically fixed frame 10 of the respective screen units 2 at the maximum temperature and humidity during actual operation at the installation site. H, the gap S between the rear surfaces of the horizontally movable frame 13 and the horizontally fixed frame 11 is set to zero.

12, 13 and 14, as shown in the second embodiment of the present invention, a vertically movable frame 12 and a horizontally movable frame 1 are provided.
The second spring 40 which is fixed to 3 is a web spring 42
However, the wire spring 43 or the rubber 45 may be used.

[0054]

According to the present invention, since the joint width can be kept constant and thin even when the temperature and humidity at the installation site change,
Since the outer edge of the screen is locked by the groove by the elastic body and the viscoelastic body, the screen is securely locked, because it has the effect of making the image easier to see and the display quality of the multi-vision image is significantly improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an appearance of multi-vision according to a first embodiment of the present invention.

2 is a schematic cross-sectional view taken along line XX of FIG.

3 is a schematic cross-sectional view taken along the line YY of FIG.

FIG. 4 is a diagram showing the operation of FIG. 2 in the multi-screen multiplex fixing device that is the main part of the present invention.

FIG. 5 is a diagram showing the operation of FIG. 3 in the multi-screen multiple fixation device which is the main part of the present invention.

FIG. 6 is a diagram showing the operation of FIG.

FIG. 7 is a diagram similarly showing the operation of FIG.

FIG. 8 is a perspective view including a partial cross-sectional view of a single screen unit 2 of multivision according to a second embodiment of the present invention as seen from the front.

9 is a schematic cross-sectional view taken along the line DD of FIG.

10 is an enlarged view of part B of FIG. 9 and shows the operations of the screen 6, the vertically movable frame 12, and the horizontally movable frame 13 due to changes in temperature and humidity.

FIG. 11 is a diagram showing the same operation.

FIG. 12 is a diagram showing an application example of the second spring of the second embodiment of the present invention.

FIG. 13 is a view showing an application example of the spring in the same manner.

FIG. 14 is a front view showing an application example in which a viscoelastic member is used for the second spring of the second embodiment of the present invention.

[Explanation of symbols]

 101 ... Multivision, 1 ... Core unit, 2 ... Screen unit, 3 ... Projection unit, 4 ... Housing, 6 ... Screen, 7 ... Storage, 8 ... Lens assembly, 10 ... Vertical fixing frame, 11 ... Horizontal fixing frame , 12 ... Vertically movable frame, 13 ... Horizontally movable frame, 16 ... Slene frame, 17 ... Groove portion, 18 ... Round hole, 21 ... Lenticular sheet, 22 ... Fresnel lens sheet, 25 ... Inner frame, 30 ... First spring , 31 ... Frame shaft, 32 ... E ring, 35 ... Movable bearing, 36 ... Bearing spring, 40 ... Second spring, 41 ... Rivet, 42 ... Web spring, 43 ... Wire spring, 45 ... Rubber, M ... Engagement Stop amount, H ... Gap, N ... Lock amount, S ... Gap, A ... Image light of projection unit.

Claims (5)

[Claims] 1. In a multi-vision comprising a unit including at least a projection unit and a screen unit, the front surface of the screen unit being aligned and assembled in a vertical and horizontal direction, the outer peripheral portion of the screen of the screen unit is a screen. A frame that abuts against the groove provided on the frame and one of the opposing sides is a fixed frame that statically holds the screen, and the other one is a movable frame that rotates about an axis parallel to the side of the screen. A screen double fixing device characterized in that the movable frame is pressed by a first elastic body or a first viscoelastic body in a locking direction of the screen. 2. The movable frame or the fixed frame according to claim 1, further comprising a second elastic body or a second viscoelastic body,
A screen double fixing device characterized in that the screen is pressed by the second elastic body or the second viscoelastic body with a force stronger than that of the first elastic body. 3. A plurality of projecting pieces are provided on a front surface of a portion of the movable frame, the fixed frame, the second elastic body, or a portion of the second viscoelastic body that engages with the screen according to claim 1 or 2. A double screen fixing device characterized in that 4. The movable shaft according to claim 1, 2 or 3, wherein the movable shaft is fixed to a fitting portion between the movable frame and the shaft even if a member fixing the shaft in the axial direction and the radial direction of the shaft is deformed. A double screen fixing device characterized by being formed so as to rotate by its own weight. 5. The double screen fixing device according to claim 4, wherein the movable frame is formed by axially pressing the movable frame with a spring.