JPH0555144U - Projection screen device - Google Patents

Abstract

(57) [Abstract] [Purpose] To prevent the occurrence of slack wrinkles on the hanging screen surface due to the bending of the winding cylinder in the hanging type projection screen device. In a hanging projection screen device, a horizontal bar member 8 is attached along the upper side of the screen 6, and the horizontal bar member 8 is placed in parallel with the screen winding cylinder 3 and a tension F is applied between both ends. And both ends of the screen winding drum 3 are locked to each other.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a hanging type projection screen device in a projection system such as a video projector, a projector, a magic lamp, etc.

[0002]

[Prior Art]

 FIG. 8 shows a vertical sectional front view of an example of the suspension projection screen device. In this example, the screen winding cylinder is rotated forward / backward by a motor to rewind the screen and hang it, and conversely it is retracted to the retracted state.

Reference numeral 1 denotes a horizontally long screen storage box, which is mounted and supported on an upper portion of a wall surface or a ceiling surface. 2 and 2 are bearing members respectively arranged on the left and right ends of the storage box 1, and 3 is a horizontally long screen winding cylinder which is rotatably supported between the bearing members 2 and 2. Reference numeral 4 is a forward / reverse rotation motor for the screen winding cylinder 3, and 5 is a wired or wireless remote controller for the motor 4. 6 is a flexible screen, the upper side of which is locked to the screen winding cylinder 3. Numeral 7 is a weight bar attached along the lower side of the screen.

In use, when the motor 4 is rotated in the normal direction by the remote controller 5, the screen winding cylinder 3 rotates in the normal direction, the screen 6 wound on the winding cylinder 3 is rewound, and descends from the storage box 1. It will be in the suspended state shown in the figure. When the motor 4 is reversely rotated by the remote controller 5 when not in use, the screen winding cylinder 3 is reversely rotated and the screen 6 in a suspended state is wound up on the winding cylinder 3 and stored in the storage box 1.

There is also one in which the motor 4 is built in the screen winding drum 3 and arranged.

The screen winding cylinder 3 is urged to rotate in a screen winding direction by a spring member to wind the screen 6 onto the winding cylinder 3 and put in a stored state. The screen 6 is pulled down by hand while turning the winding drum 3 in the reverse direction against the upward urging force to put it in a suspended state. When the screen is sufficiently pulled down, the return rotation of the winding drum 3 is locked. There is also a manual type.

There is also one in which the screen 6 is manually wound around the winding drum 3 for storage and storage, and when used, it is rewound and hung like a hanging shaft on a stand or a hook on a wall surface.

[0008]

[Problems to be solved by the device]

 In the hanging type projection screen device as described above, a slack wrinkle is likely to occur on the central surface of the screen 6 as indicated by reference numeral 6a in FIG. This is because the screen winding cylinder 3 is bent (bent) by being bent downward by some weight between the bearing members 3 at the left and right ends, as shown by exaggerating with a two-dot chain line. there were.

An object of the present invention is to prevent the occurrence of loose wrinkles 6a on the surface of the hanging screen 6 due to the above-mentioned bending of the winding cylinder 3 in the hanging projection screen device.

[0010]

[Means for Solving the Problems]

 The present invention is a projection screen device having the following configuration.

(1) In the suspension type projection screen device, a horizontal bar member 8 is attached along the upper side of the screen 6, and the horizontal bar member 8 is tensioned in parallel with the axis of the screen winding cylinder 3 and between both ends. A projection screen device characterized in that both ends are locked to the screen winding drum 3 in a state where F is applied.

(2) In the hanging type projection screen device, the screen 6 goes from the left and right ends to the center in accordance with the downward curving between the left and right ends of the screen winding cylinder 3 when the screen is in a hanging state. According to the above, the projection screen device is characterized in that the upper side of the screen 6 is fixed to the screen winding drum 3 in advance with the screen length reduced.

(3) In the suspension type projection screen device, the upper side of the screen is previously cut into a concave arc shape in accordance with the downward curving between the left and right ends of the screen winding cylinder 3 when the screen is suspended. The concave arc-shaped upper side 6b of the screen is straightened and fixed to the screen winding cylinder 3 along a straight line parallel to the winding cylinder axis, and the screen length increases from the left and right ends of the screen 6 toward the center. A projection screen device characterized in that it is packed with.

[0014]

[Action]

 In the projection screen device having the above configuration (1), when the screen 6 is sufficiently unwound and the screen is suspended, the upper side of the screen 6 is directly locked even if the winding cylinder 3 bends downward. Since the rod 8 is provided with tension F so that both ends of the rod 8 are locked to the winding drum 3, the horizontal rod 8 is straight like a bow string regardless of the bending of the winding drum 3 itself. The state is maintained. Therefore, the occurrence of the loose wrinkles 6a on the surface of the hanging screen 6 due to the bending of the winding drum 3 is prevented.

Further, in the projection screen device having the above configurations (2) and (3), the vertical dimension of the screen 6 is curved downward from the left and right ends toward the center in the width direction of the screen. Since the screen 6 is sufficiently lengthened, the screen slack that tends to occur in the central portion of the screen 6 even when the screen 3 is sufficiently rewound and the winding cylinder 3 is curved downward in the suspended state. I have just been cancelled. Therefore, the occurrence of the loose wrinkles 6a on the surface of the hanging screen 6 due to the bending of the winding drum 3 is prevented.

[0016]

【Example】

 <Example 1> (FIGS. 1 to 4) This example is an example of the apparatus (1).

This is applied to the above-mentioned electric suspension type projection screen device of FIG. The same components and parts are designated by the same reference numerals, and the description thereof will be omitted. 1 is an exploded perspective view of a main part, FIG. 2 is an enlarged cross-sectional view of a portion of a winding drum 3 when a screen 6 is unwound and suspended, FIG. 3 is an enlarged plan view of both end portions of the winding drum, and FIG. FIG. 4 is a vertical sectional view taken along line (4)-(4) of FIG. 3.

The screen winding cylinder 3 is a pipe material made of aluminum in this example, and has a length dimension equal to or greater than the width dimension of the screen 6 (about 2 m in the apparatus of this example). On the outer surface of the winding drum 3, concave groove lines 3a are formed along the length of the winding drum in parallel with the winding drum axis.

Reference numeral 8 is a horizontal bar member attached along the upper side of the screen 6 by an appropriate means such as adhesion, and is comparable to a metal bar member or wire such as steel or aluminum alloy having high tensile strength, or a metal such as hard vinyl chloride. It is a high-strength plastic material or the like having the strength to withstand.

The horizontal bar 8 on the upper side of the screen is fitted into the concave groove 3a of the screen winding cylinder 3, one end of the horizontal bar 8 is locked to the winding cylinder by a stopper pin 9, and the other end is fixed. A tension F (for example, 5 to 10 kg) is applied to the horizontal bar 8 by pulling it with a pulling jig, and the other end of the horizontal bar 8 is locked to the winding cylinder by a stop pin 9. .. Therefore, the upper side of the screen is locked to the winding drum 3 via the horizontal bar member 8 which is provided with tension F to the winding drum 3 and has both ends locked.

When the winding cylinder 3 is driven in the reverse direction, the screen 6 is wound up on the winding cylinder 3 as shown by the chain double-dashed line in FIG. Further, when the winding drum 3 is driven in the normal direction, it is unwound and put in a suspended state.

When the screen 6 is sufficiently unwound and the screen is suspended, even if the winding cylinder 3 is bent downward as described above, the horizontal bar 8 that directly locks the upper side of the screen 6 does not apply the tension F. Since both ends of the horizontal rod 8 are provided and locked to the winding drum 3, the horizontal rod 8 is kept straight regardless of the bending of the winding drum 3 itself.

Therefore, it is possible to prevent the occurrence of loose wrinkles 6a on the surface of the hanging screen 6 due to the bending of the winding cylinder 3 in the hanging projection screen apparatus.

The winding drum 3 is not provided with the concave groove 3a into which the screen horizontal rod 8 is fitted, but the horizontal rod 8 is made parallel to the winding drum axis and a tension F is applied between both ends so that both ends are The outer surface of the winding drum may be locked with a locking member 9/9.

The present invention can be applied to a manual type or a hanging type device, and similar effects can be obtained.

Example 2 (FIGS. 5 to 7) This example is an example of the apparatus of (2) or (3).

As shown in FIG. 5, the upper side of the screen is preliminarily cut into a concave arc shape 6b in accordance with the downward curve between the left and right ends of the screen winding cylinder 3 when the screen is suspended, and the concave arc upper side of the screen is cut. 6b is straightened to the screen winding cylinder 3 along a straight line 3b parallel to the winding cylinder axis and fixed with an adhesive / adhesive tape (Fig. 6). The screen length is reduced as it goes to.

That is, since the vertical dimension of the screen 6 is reduced from the left and right ends toward the center in the width direction of the screen in accordance with the downward curve of the screen winding cylinder 3, the screen 6 is sufficiently wound. Even when the winding cylinder 3 is bent downward as shown in the model diagram of FIG. 7 when the screen is returned to the suspended state, the screen slack wrinkles that are about to occur on the central surface of the screen 6 are just canceled. Therefore, the occurrence of the loose wrinkles 6a on the surface of the hanging screen 6 due to the bending of the winding drum 3 is prevented.

[0029]

As described above, according to the present invention, the occurrence of loose wrinkles 6a on the hanging screen surface due to the bending of the winding cylinder 3 in the hanging projection screen apparatus is improved, and the intended purpose is improved. Can be reached.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a main part of an apparatus according to an embodiment.

FIG. 2 is an enlarged cross-sectional view of a winding drum portion when the screen is rewound and suspended.

FIG. 3 is an enlarged plan view of both ends of the winding drum.

FIG. 4 is a vertical sectional view taken along line (4)-(4) of FIG.

FIG. 5 is a view showing a state in which the upper side of the screen is cut into a concave arc shape.

FIG. 6 is a view showing a state in which the concave arc-shaped upper side of the screen is straightened and fixed to the screen winding cylinder along a straight line parallel to the winding cylinder axis.

FIG. 7 is a diagram showing a state in which the screen winding drum is bent downward due to bending due to weight.

FIG. 8 is a vertical sectional front view of an example of a suspension projection screen device.

[Explanation of symbols]

 1 Screen Storage Box 2 Bearing Member 3 Screen Winding Body 4 Screen Winding Body Drive Motor 5 Remote Controller 6 Screen 7 Weight Horizontal Bar 8 Horizontal Bar Mounted Along the Top Edge of Screen 9 Stop Pin 6b Upper Edge of Concave Circular Cut of Screen

Claims (3)

[Scope of utility model registration request] 1. A suspension type projection screen device, wherein a horizontal bar member 8 is attached along an upper side of a screen 6,
The horizontal bar 8 is parallel to the axis of the screen winding cylinder 3 and tension F is applied between both ends of the screen winding cylinder 3 so that both ends are locked to the screen winding cylinder 3. Projection screen device. 2. In the hanging type projection screen device, the width of the screen 6 from the left and right ends toward the center is adjusted so as to correspond to the downward curving between the left and right ends of the screen winding cylinder 3 when the screen is hung. Therefore, the projection screen device is characterized in that the upper side of the screen 6 is previously fixed to the screen winding cylinder 3 in a state where the screen length is reduced. 3. In a hanging type projection screen device, the upper side of the screen is previously cut into a concave arc shape in accordance with the downward curve between the left and right ends of the screen winding cylinder 3 when the screen is in a hanging state. The concave arc-shaped upper side 6b is straightened and fixed to the screen winding cylinder 3 along a straight line parallel to the winding cylinder axis, and the screen length is reduced from the left and right ends of the screen 6 toward the center. A projection screen device characterized by being put into a state.