JP3164227U - Screen device - Google Patents

Abstract

Disclosed is a screen device that does not cause distortion or wrinkles on the screen surface and does not affect the image even when a proximity projector is used. In a screen device that lowers a screen 2 attached to a rod-shaped body 3 and retracts the screen 2 by winding it upward and pulling it downward, the screen 2 extends and vertically extends downward from above. A telescopic link mechanism 10, a long horizontal member 22 extending from the lower end of the link mechanism 10 along the rod-shaped body 3, and stretched up and down along the sides on the outer sides of both sides of the screen 2. The horizontal member 22 and the rod-shaped body 3 are at least 1/2 to 2/2 with respect to the full length of the lower side of the screen 2. The link mechanism 10 is fixed at two left and right positions having a distance of 3, and the link mechanism 10 can be locked in the fully extended state in which the screen 2 is unfolded. [Selection] Figure 2

Description

  The present invention relates to a screen device that is wound around and stored in the vicinity of the ceiling when not in use, indoors, such as a conference room, banquet hall, gymnasium, theater, etc., and extends downward when in use. The present invention relates to a screen device that does not cause wrinkles on the screen when in use.

  When performing projector projection, slide projection, movie appreciation, etc. for explanations and entertainment in conference rooms, banquet halls, gymnasiums, theaters, etc. or relatively large rooms, a screen for projecting images is required. Since it is troublesome to install a screen for each projection, wind the screen around the ceiling in advance, and pull the screen downward from the ceiling when projection is necessary. The video is projected, and when the projection is finished, the screen is wound again and stored near the ceiling.

  It is important that the screen stored near the ceiling is wound and stored near the ceiling when not in use, and it is important to hold the plane in the extended state during use. When the screen is pulled out by fixing it to the rotating shaft installed near the ceiling and winding the screen by rotating the rotating shaft, while attaching a solid bar along the lower side of the screen, The upper side of the screen is stretched and held in the horizontal direction by the pivot, and the lower side is stretched and held by the rod-shaped body. The screen is pulled downward by the weight of the rod-shaped body, so that the screen is pulled up, down, left and right. Will be maintained.

  Note that the winding and pulling of the screen to and from the rotating shaft can be performed by forward / reverse rotation of the rotating shaft by an electric motor, or by urging the screen in the winding direction by a spring, and the force of the spring can be manually applied. For example, there is one that pulls out the rod-like body downward and locks the screen by an appropriate means at the end of the drawing (for example, see Patent Document 1).

  When projecting using a screen, the projector is placed on a desk, etc., approximately the same height as the screen in use, and the projected image position and focus are adjusted by performing a test projection on the screen. It was.

  On the other hand, recently, due to the hassle of installing a projector each time it is projected and the space efficiency of the projector, the projector has been fixedly installed near the ceiling in front of the screen in the opposite direction and extended using a mirror. Some are adjusted in advance so that the screen comes into focus (for example, see Patent Document 2).

  In addition, a specially-configured lens group and concave mirror are placed in a single projector, and a space-saving projector that focuses directly on the screen while being fixed near the ceiling just before the screen is developed as in Patent Document 2. Has been.

Japanese Patent No. 2999424 JP 2001-356418 A

  By the way, the winding and storing type screen that is wound and stored when not in use uses a flexible cloth or sheet-like material, and is stretched and flat when in use. Although the plane may be distorted, if the projector is installed on the desk each time it is projected, there is a distance between the screen surface and the projector, even if there is some distortion or wrinkle of the screen, Since the positional deviation of the front and back of the screen surface due to the distortion and wrinkles is very small compared to the distance between the screen surface and the video machine, the problem was not so great as to affect the projected image.

  However, in the case of using the projector of Patent Document 2 or the above-mentioned space-saving projector, a special image so that the image is focused on a vertical screen surface even though it is illuminated from a position close to the screen surface and obliquely from above. A lens or reflector is used, and the focus position of the image is severe. Even if a slight distortion or wrinkle occurs on the screen surface, the projected image may be affected.

  These winding storage type screens have been devised so as not to cause wrinkles or distortion during use in order to be applied to the latest projectors as described above. For example, they are attached to the lower side of the screen. Although the weight of the rod-shaped body to be applied may be increased and the vertical tension applied to the screen may be increased, in addition to the increase in cost due to the increase in weight and the burden during carrying and installation, There is a problem of increasing the burden on the electric motor.

  In addition, there may be a means to secure flatness by fixing a solid bar or the like at an appropriate place on the screen at multiple locations. However, if a strong tension is applied to the screen carelessly, In addition, long wrinkles along the direction of tension may occur on the screen surface.

  Furthermore, even if the flatness with respect to the screen is ensured by various means, if the entire screen is shaken by the wind or the like, the screen will be removed from a severe focus position, and there is a problem that an accurate projection image cannot be secured. .

  Therefore, the present invention solves the above-mentioned problems, and in a screen device that is usually wound and extended during use, the screen surface is not distorted or wrinkled, and the screen surface is not shaken by wind or the like. It is an object of the present invention to provide a screen device that does not affect an image even when a severely focused projector such as Patent Document 2 is used.

  In order to solve the above-described problems, the invention of claim 1 is directed to a screen that is attached to a horizontal rotating shaft with the upper side installed at the upper side and attached to a rod-like body with the lower side mounted on the rotating shaft. In a screen device that performs storage by rotation and deployment by pulling downward from the rotating shaft, a link mechanism that can be extended and retracted vertically from the vicinity of the rotating shaft on the back surface of the screen, and a lower end of the link mechanism A long horizontal member extending along the bar at the bottom of the screen, and stretched vertically along the sides on the outside of both sides of the screen, and connected to the sides of the screen with connecting members at appropriate intervals. The horizontal member and the rod-shaped body are connected and fixed at two left and right positions having a distance of 1/2 to 2/3 with respect to the entire lower side of the screen, and the link mechanism unfolds the screen. Last A screen device characterized in that it comprises a lockable locking mechanism Shin state.

  According to the invention of claim 2, the screen attached with the upper side attached to the horizontal rotary shaft installed at the upper side and the lower side attached to the rod-like body is stored by winding the screen around the rotary shaft reversibly rotated by the motor. And a screen device that performs expansion by pulling downward from the rotating shaft, and a link mechanism that can be extended and retracted vertically from the vicinity of the rotating shaft on the back surface of the screen, and a lower end of the screen from the lower end of the link mechanism. A long horizontal member extending along the rod-like body, and a wire member which is stretched up and down along the side on the outside of both sides of the screen and connected to the side of the screen with a connecting member at an appropriate interval. The horizontal member and the rod-shaped body are connected and fixed at two left and right positions having a distance of 1/2 to 2/3 with respect to the entire lower side of the screen. .

  The screen device to which the present invention is applied, as in the first aspect of the present invention, winds the screen around the rotating shaft using a spring, and draws the rod-shaped body manually from the rotating shaft. Either the one that is pulled down and deployed, or the one that automatically turns the rotating shaft forward and backward automatically and electrically using a motor as in the invention of claim 2 may be used.

  By connecting and fixing the bar and the horizontal member that are attached to the entire length of the lower side of the screen, a downward link tension is applied to the bar by the locked link mechanism. If only the central part of the rod-shaped body, a downward tension is applied only to the central part of the rod-shaped body, the rod-shaped body is bent slightly into a V shape, and conversely, it is connected and fixed to the horizontal member at both ends of the rod-shaped body. Then, downward tension is applied to both ends of the rod-like body, and the rod-like body is bent slightly in an inverted V shape, resulting in wrinkles and distortion on the screen.

  On the other hand, as in this device, if the fixing points of the rod-like body and the horizontal member are connected and fixed at two places with an interval in the range of 1/2 to 2/3 with respect to the entire length of the lower side of the screen, Thus, a downward force is equally applied to the two places, the rod-shaped body does not bend, and as a result, no wrinkles or distortion occurs on the screen.

  It should be noted that the connecting and fixing portions of the rod-like body and the horizontal member may be provided at three or more locations as a whole, or may be connected and fixed at a plurality of locations over the entire length. The screen may be wrinkled or distorted due to the difference in the tension of the fixed part at the location, so it is necessary to adjust the fixing force (tension) at the fixed part, or the length of the horizontal member and the number of fixing members increase. Since the labor and cost of the production increase, the necessary and sufficient effect is produced if two places are fixed within the range specified by the present invention in consideration of the labor and cost and the effect.

  In addition, the screen is connected with a connecting member at an appropriate interval with respect to the wire stretched up and down along the sides on the outside of both sides of the screen. Tension is applied from the top, bottom, left and right, but the downward force applied by the horizontal material at the two left and right sides of the rod-shaped body increases the tension applied to the wire, resulting in the screen side connected by the connecting member. The lateral tension to the also increases.

  As described above, according to the first aspect of the present invention, when the screen is unfolded and the link mechanism is locked, the horizontal member attached to the lower end of the link mechanism is 1/2 to 2 of the total length of the lower side of the screen relative to the rod-shaped body. Since the rod-like body is connected and fixed at two places on the left and right sides with a distance of / 3, the downward force is applied only in the vicinity of the center, so that it bends in a V shape with the center facing down, Will not bend into an inverted V shape due to the applied force, and the rod will receive downward force without bending, and as a result, the screen attached to the rod will not be distorted or wrinkled. Even downward tension is applied.

  In addition, since the left and right sides of the screen are connected by connecting members at appropriate intervals with respect to the wire stretched up and down on the outside, an equal tension is applied over the entire side in the wire direction, The screen will be pulled evenly from top to bottom and left and right, improving flatness without wrinkles and distortion, and even with the proximity projectors installed near the ceiling due to wrinkles and distortion of the screen surface. There is no adverse effect on the video.

  Furthermore, since the screen is fixed at the two left and right positions of the rod-shaped body along the lower side by a horizontal member connected to a mechanically locked link mechanism, it does not shake or move due to wind or the like, The projected image is not disturbed.

  Next, according to the invention of claim 2, only the force developed downward from the rotating shaft acts on the screen due to the weight of the rod-like body, the horizontal member connected thereto, and the link mechanism. There is no upward force to wind up the screen using a spring such as a rotating shaft, and the screen is unfolded and stored only by reversibly rotating the rotating shaft with a motor. When unfolding, the motor is stopped and the lock mechanism of the link mechanism is not required. At that time, the connection is fixed at two places on the left and right of the rod-shaped body with a distance of 1/2 to 2/3 of the total length of the lower side of the screen. Since the downward force is applied by the weight of the link mechanism or the horizontal member, the rod-shaped body or the screen attached to the rod-shaped body may be distorted or wrinkled, as in the case of claim 1. Given the tension in the downward direction evenly.

  In addition, since the left and right sides of the screen are connected to the wires extending vertically by connecting members at appropriate intervals, there is no possibility of adverse effects on the image due to screen surface wrinkles or distortion. The same as in claim 1.

  Furthermore, the weight of the link mechanism and horizontal material is applied to the left and right fixed parts of the rod-shaped body along the lower side, and the screen is fixed by applying downward force at the two left and right parts. It is the same as in claim 1 that the projected image is not disturbed.

  In addition, the invention of claim 1 or claim 2 has a simple structure, and there is no increase in the weight surface to increase the weight of the rod-like body in order to apply tension to the screen. And the burden on the electric motor does not increase, so there is no increase in cost.

It is a rear view of the storage state of the screen in the screen device of this invention. It is a rear view of the unfolded state of the screen in the screen device of this invention. It is a principal part expansion perspective view in the screen apparatus of this invention. It is a principal part enlarged rear view in the screen apparatus of this invention. It is a principal part expansion perspective view in the screen apparatus of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in FIGS. 1 and 2, the screen case 1 of the screen device of the present invention has a long shape capable of storing a wound body (not shown) obtained by winding a screen 2 to be stored in a cylindrical shape. Also, it is a cylindrical box, and there are various sizes depending on the size of the screen 2 to be housed. As an example, it has a diameter of about 100 mm and a length of about 2 m. Further, an opening groove (not shown) for taking in and out the screen along the longitudinal direction is provided on the lower surface of the screen case 1.

  The shape of the screen case 1 is not limited to the illustrated cylindrical shape, and may be rectangular, and the material of the screen case 1 is not particularly limited. In general, an aluminum alloy is used.

  A rotating shaft (not shown) energized by a winding force such as a spring is accommodated in the screen case 1, and the screen 2 is wound around the rotating shaft and wound up by the force of a spring or the like to be cylindrical. A winding body is formed, and the screen 2 is drawn downward from the winding body through the opening of the screen case 1 described above.

  A rod-like body 3 is attached along the entire lower side of the lower end of the screen 2, and a handle 4 is provided near the center of the rod-like body 3. The handle 4 is held in a hand or hooked on a hook and then lowered. In this case, the screen 2 moves downward while rotating the rotating shaft in the screen case 1 in the direction opposite to the winding direction, and can be stopped by a lock mechanism described later in a state where the screen 2 is extended to the maximum. It has become.

  The screen case 1 is fixed under the ceiling, as shown in the perspective views of FIGS. 1, 2 and 3, with two vertical support pillars whose upper ends are attached to the ceiling by appropriate means. The screen case 1 is suspended and supported by 5.

  In addition, a mounting frame 6 composed of a horizontal flat plate 7 and a vertical flat plate 8 provided continuously behind the horizontal flat plate 7 at the center of the screen case 1 is provided on the flat plate 7 and / or flat plate 8. The case 1 is connected and fixed by screwing with a screw 9.

  Further, the upper link 11, 11 is pivotable by passing through the upper ends of the pair of upper links 11, 11 constituting the link mechanism 10 to the flat plate 8 behind the mounting frame 6 and connecting to the flat plate 8. A pair of holding pins 12, 12 are held on one side, and one upper link 11 is rotatable around a vertical plane parallel to the screen 2 when unfolded around the holding pin 12.

  As shown in FIG. 4, the upper ends of the lower links 14 constituting the link mechanism 10 are connected to the lower ends of the pair of upper links 11, 11 via the hinge members 13. The upper piece 16 and the lower piece 17 rotated by the holding pin 15 are connected to the lower end of the upper link 11, the lower piece 17 is connected to the upper end of the lower link 14, and the holding pin. By penetrating and holding 15 so as to be perpendicular to the unfolded screen 2, the lower link 14 can move freely in a vertical plane parallel to the screen 2 with respect to the upper link 11. .

  As shown in FIG. 5, the lower links 14, 14 of the pair of lower links 14 are rotated by holding pins 20 that are perpendicular to the unfolded screen 2 on a flat plate 19 parallel to the screen 2 of the lower mounting frame 18. It is attached movably.

  Further, a horizontal flat plate 21 connected in front of the vertical flat plate 19 of the lower mounting frame 18 is attached with a horizontal horizontal member 22 parallel to the rod-like body 3 at the lower end of the screen 2. The size of the rod-shaped body 3 is about ½, and the both ends of the horizontal member 22 are connected and fixed to the rod-shaped body 3 by appropriate fixing means 23 such as screwing or fitting.

  A pair of upper links 11 and a pair of lower links 14 constitute a pantograph-type link mechanism 10, in accordance with the expansion of the screen 2 by pulling it from the screen case 1 and the storage by winding the screen 2 around a rotating shaft, The pantograph of the link mechanism 10 is bent or stretched accordingly and follows.

  As shown in FIG. 3, the vertical plate 8 of the mounting frame 6 near the screen case 1 is provided with a lock mechanism for fixing the link mechanism 10 when the screen 2 is unfolded. Two cuts are made at the lower end of the flat plate 8 sandwiched between the upper links 11 so that the cut portions are raised rearward so that the upper link 11 does not move further inward when the screen 2 is unfolded. A receiving piece 24 for receiving the inner side of the upper link 12, and elasticity that protrudes on both sides in the vicinity of the lower end of the locking piece 26 fixed to the flat plate 8 by screws 25 or the like on the upper side of the receiving piece 24. The elastic piece 27 is provided with protrusions 28 that protrude forward from both ends of the elastic piece 27.

  When the screen 2 is in the unfolded state, the elastic piece 27 wraps around the rear side of the upper link 11, and when the projection 28 protruding forward passes the inner side of the upper link 11, the elasticity of the elastic piece 27 causes the upper link 11 to move forward. When the upper link 11 passes through the projection 28 and contacts the receiving piece 24 and does not move further inside, the projection 28 returns to the front due to the elasticity of the elastic piece 27. The upper link 11 is prevented from escaping to the outside, and the upper link 11 is fixed between the receiving piece 24 and the projection 28.

  The link mechanism 10 having a locking function by the protrusions 28 of the receiving piece 24 and the elastic piece 27 is configured as described above, and when the screen 2 has been unfolded, a force for manually pushing down the handle 4 is finally applied. Then, the upper link 11 pushes and releases the protrusion 28 of the elastic piece 27 and comes into contact with the receiving piece 24, and the mechanical fixing (locking) of the link mechanism 10 is completed by the return of the protrusion 28.

  As shown in FIGS. 1 and 2, a wire 29 is stretched along the side on the outside of both sides of the screen 2, and the wire 29 and the screen 2 The side edges are connected by the connecting means 30 with an appropriate interval.

  The wire 29 has an upper end connected to the rotating shaft in the screen case 1 and a lower end connected to the rod-shaped body 3, so that when the screen 1 is housed by winding around the rotating shaft or expanded by being stretched, It moves following the screen 2 and its material is not particularly limited, but it does not obstruct the rotation to the rotation axis, and requires strength on the extension side so as not to loosen or loosen. There may be used, and a fiber thread, a metal wire, etc. are used.

  In the illustrated example, the connecting means 30 is a thin wire such as a thread or a wire as in the case of the wire 29, but is not limited to this. For example, a short side made of cloth is used, and the wire 29 is appropriately spaced. And the side of the screen 2 may be connected.

  When the reversible rotation motor is used for the rotation shaft and the screen 2 is unfolded and stored electrically, the screen 2 is moved up and down exclusively by the rotation of the motor. A spring that always gives upward force for winding is not used, and a lock mechanism using the elastic piece 27 and the protrusion 28 for fixing the link mechanism 10 in the unfolded state of the screen 2 is unnecessary. These components are the same as those shown in the manual method.

  The screen device of the present invention is configured as described above. Next, a method for using the screen device will be described.

  First, in the storage state of the screen 2 in FIG. 1, the upper link 11 and the lower link 14 of the link mechanism 10 are in a folded state, and the whole is stored near the ceiling.

  Next, by securing the handle 4 by holding the handle 4 or hooking a long jig on the handle 4 and pulling the handle 4 downward in this state, the screen 2 is also removed from the screen case 1 accordingly. Derived.

  As shown in FIG. 1, when the screen 2 is fully extended and the unfolded state shown in FIG. 2 is reached, the upper link 11 pushes the projection 28 of the elastic piece 27 backward and passes through as shown in FIG. By abutting on the piece 24, the upper link 11 is fixed in this state by being sandwiched between the receiving piece 24 and the protrusion 28 that has returned to the front due to the elasticity of the elastic piece 27.

  By fixing the upper link 11, the link mechanism 10 fixes the screen 2 in the unfolded state. At this time, the horizontal member 22 fixed to the lower side of the link mechanism 10 via the lower mounting frame 18 is The rod-like body 3 on the lower side of the screen 2 is held by the fixing means 23 at both ends, and the screen 2 is pulled down against the winding force on the upper rotation shaft, so that the screen 2 is moved in the vertical direction. Will give a strong tension to.

  In addition, since the left and right sides of the screen 2 are connected to each other by the wire 29 on the outside and the plurality of connecting members 30, a lateral tension is applied to the screen 2.

  As described above, the link mechanism 10 is fixed to the screen 2 by the lock mechanism, so that a vertical tension is given, and a horizontal tension is given by the connecting member 30 connected to the wire 29. As a result, tension is applied to the top, bottom, left and right, so that the surface of the screen 2 is not wrinkled or distorted, and the screen 2 is not shaken by wind or the like.

  This action will be described in more detail. First, if the link mechanism 10 directly applies a downward force to one central portion of the rod-shaped body 3, the rod-shaped body 3 is bent into a fine V-shape, while the horizontal If a downward force is applied to the two end portions of the rod-shaped body 3 via the material 22, a fine inverted V-shaped bend is generated in the rod-shaped body 3. According to the configuration of the present invention, the link mechanism 10 Since the downward tension is applied to the screen 2 by the lock in the vertical direction at two locations that are 1/6 to 1/4 of the total length of the rod 3 from both ends of the rod 3, the rod 3 Thus, the force is applied evenly at two locations on the left and right inward, and vertical wrinkles and distortions to the screen 2 due to bending of the rod-shaped body 3 do not occur.

  Further, the wire 29 for applying a lateral tension to the side of the screen 2 needs to be stretched with a certain level of tension without loosening. The force for pulling up the both ends of the rod-shaped body 3 is an upward pulling force to the screen 2 and may cause wrinkles in the vertical direction or the wrinkles. A mechanical downward force that overcomes the tension of the wire 29 is applied to the body 3. As a result, the tension of the wire 29 is further increased, the tension in the left-right direction against the screen 2 is also increased, and the plane of the screen 2 is increased. Will be improved.

  After the screen is used, the link mechanism 10 is bent by manually pushing up the rod-like body 3, the upper link 11 is rotated outward about the holding pin 12, and the protrusion 28 is moved backward by utilizing the elasticity of the elastic piece 27. The upper link 11 escapes to the outside of the protrusion 28 while being pushed away, and then the screen 2 is wound around the rotating shaft by the spring force of the rotating shaft in the screen case 1 and stored in the upper portion as shown in FIG. .

  In the case of the electric system, the screen 2 can be unfolded and stowed only by controlling the reversible rotation motor. Therefore, there is no lock mechanism for the link mechanism 10, and the screen 2 can be locked when being unfolded or stowed. It is not necessary to push up the rod-shaped body 3 manually.

  As mentioned above, although the embodiment of the screen device of the present invention has been described based on the accompanying drawings, the screen device of the present invention is not limited to this embodiment, and the design is appropriately changed within the scope of the object of the present invention. Can be implemented.

DESCRIPTION OF SYMBOLS 1 Screen case 2 Screen 3 Rod-shaped body 4 Handle 5 Support pillar 6 Mounting frame 7 Flat plate 8 Flat plate 9 Screw 10 Link mechanism 11 Upper link 12 Holding pin 13 Hinge member 14 Lower link 15 Holding pin 16 Upper piece 17 Lower piece 18 Lower part Mounting frame 19 Flat plate 20 Holding pin 21 Flat plate 22 Horizontal member 23 Fixing means 24 Receiving piece 25 Screw 26 Locking piece 27 Elastic piece 28 Protrusion 29 Wire rod 30 Connecting member

Claims (2)

  The screen with the upper side attached to the horizontal rotating shaft installed at the upper side and the lower side attached to the rod-shaped body is housed by winding around the rotating shaft and deployed by pulling downward from the rotating shaft. In the screen device, a link mechanism that can be extended and retracted vertically from the vicinity of the rotation axis on the back surface of the screen, and a long horizontal member that extends from a lower end of the link mechanism along a rod-like body on the lower side of the screen; And a wire rod that is stretched vertically along the sides on the outside of both sides of the screen and is connected to the sides of the screen and connecting members at appropriate intervals, and the horizontal member and the rod-shaped body are at least a screen It is connected and fixed at two left and right positions with a distance of 1/2 to 2/3 with respect to the entire lower side of the lower side, and the link mechanism has a lock mechanism that can be locked in a fully extended state with the screen deployed. Screen device that.   The screen with the upper side attached to the horizontal rotating shaft installed on the upper side and the lower side attached to the rod-shaped body is stored by winding around the rotating shaft reversibly rotated by the motor, and the screen is moved downward from the rotating shaft. In a screen device that performs deployment by pulling out, a link mechanism that can be extended and retracted vertically from the vicinity of the rotation axis on the back surface of the screen, and a long length extending from the lower end of the link mechanism along a rod-like body on the lower side of the screen A horizontal member having a shape, and a wire connected to the side of the screen at an appropriate interval and connected by a connecting member on the outside of both sides of the screen. The rod-shaped body is connected and fixed at two left and right positions having a distance of 1/2 to 2/3 with respect to the entire lower side of the screen.

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