JP2011170067A - Screen unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a screen from being inclined toward the side to which the screen is attached in a screen unit in which the screen is attached to an elevating device. <P>SOLUTION: The screen unit is equipped with: a screen body (10); a first support member (30) which is attached to one end of the screen body; a second support member (40) which is attached to the other end of the screen member facing the first support member, an elevating mechanism (60) whose one end is attached to the first support member; and a tensioning member (20) which is disposed on the opposite side of the screen body (10) with respect to the elevating mechanism (60), has one end attached to the first support member, and applies tension in a direction substantially parallel to a direction from the first support member to the second support member. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a screen device.

Conventionally, a substantially short screen body having flexibility, a winding shaft that supports one end of the screen body, winds up the screen body, and a support that supports a side facing the side supported by the winding shaft. In addition, a screen device is known that includes a lifting mechanism that is attached to a support and adjusts the height of the screen (see, for example, Patent Document 1).
In the screen device described in Patent Document 1, three pairs of arms are provided between a support portion that supports one end of the screen body and a winding shaft that supports a side facing the side supported by the support. A lifting mechanism connected to each other is installed. A pair of springs (gas springs or coil springs) are provided between the pair of arms positioned at the center in the vertical direction of the lifting mechanism and the pair of arms disposed on the winding shaft side. The screen body is extended and stored by expanding and contracting the lifting mechanism by the pressure or elastic force of the spring.

JP 2000-131766 A

  Further, in the screen device described in Patent Document 1, the screen is stretched by applying tension to the screen body at the same time as extending and lowering the lifting device using a pair of spring coils. However, since no tension is generated on the surface (front surface) opposite to the surface (front surface) on which the screen main body is attached to the lifting device, there is no balance of force between the front and rear surfaces of the lifting device. . Therefore, the elevating device cannot maintain a vertical posture, and a tilt occurs on the side on which the screen main body is attached. As a result, the screen main body is tilted, and there is a problem that an image from the projector is deformed.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 A screen device according to this application example includes a flexible substantially rectangular screen main body, a first support attached to one end of the screen main body, and the first support. A second support attached to the other end of the screen body facing the other; a lifting mechanism having one end attached to the first support; and an opposite side of the screen body with respect to the lifting mechanism. A tension member that has one end attached to the first support and applies a tensile force in a direction substantially parallel to a direction from the first support member toward the second support. .

  According to this application example, the surface on which the screen main body is attached to the lifting mechanism by the tension member that has one end attached to the first support and applies a tensile force in the direction of the second support. Tension can be generated on the opposite surface. As a result, the tension generated by the tension member between the first support attached to one end of the screen body and the second support attached to the other end facing the first support is generated by the tension member. Therefore, it is possible to balance the front and back forces of the lifting mechanism and maintain the lifting mechanism in a vertical posture.

  Application Example 2 In the screen device according to the application example described above, the screen device includes a base member attached to the other end of the lifting mechanism, and a third support attached to the other end of the tension member. It is preferable that the second support or the third support is attached to the base member.

  According to this configuration, one end of the tension member is supported by the third support, and the third support is attached to the base member, so that the tension member is attached between the first support and the third support. Thus, the pulling member can be reliably pulled, and thus the posture of the lifting mechanism can be further maintained vertically.

  Application Example 3 In the screen device according to the application example described above, the tension member is a flexible cloth.

  According to this configuration, the screen main body attached to the front surface of the lifting mechanism and the fabric attached to the rear surface of the lifting device are substantially symmetric with respect to the lifting device. As a result, the tensions on the front and back surfaces of the lifting device are equalized, and the posture of the lifting device can be maintained more easily.

  In addition, by making the tension member flexible, the lifting device can be sandwiched between the screen body and the tension member, and the lifting mechanism that is originally exposed can be covered. For this reason, it is impossible to easily put a hand or the like into the joint portion of the lifting mechanism, and thus it is possible to reduce the risk of an accidental finger nail.

  Furthermore, by attaching the fabric to the back of the lifting mechanism, it is possible to project an image on the back of the screen device. Therefore, images can be projected simultaneously on the front and back surfaces. Further, by using a cloth having characteristics different from that of the screen base material as the tension member, the front surface and the back surface of the screen device can be properly used according to the use environment.

  Application Example 4 In the screen device according to the application example, it is preferable that the second support body or the third support body have a winding structure.

  According to this configuration, when the screen main body is expanded and stored by the lifting mechanism, the tension member or the screen main body can be wound up following this. Therefore, when the screen device is not used, it can be easily carried without taking up space.

  Application Example 5 In the screen device according to Application Example 2, the tension member is a string-like member, and the second support body or the third support body has a winding structure.

  By making the tension member a string-like member, the winding structure of the tension member can be easily mounted in a space-saving and low-cost manner. Thereby, the structure which maintains the attitude | position of a raising / lowering mechanism can be mounted, without changing the structure of the conventional screen apparatus largely.

  Moreover, the horizontal maintenance of a 1st support body and a bending can also be suppressed by attaching multiple said tensile structures.

The figure explaining schematic structure of the screen apparatus which concerns on 1st Embodiment. The figure explaining schematic structure of the screen apparatus which concerns on 1st Embodiment. The figure explaining the winding structure of the screen apparatus which concerns on 1st Embodiment. The figure explaining schematic structure of the screen apparatus which concerns on 2nd Embodiment. The figure explaining schematic structure of the screen apparatus which concerns on 2nd Embodiment. The figure explaining the winding structure of the screen apparatus which concerns on 2nd Embodiment.

  The present embodiment will be described below with reference to the drawings. In each of the drawings to be referred to, the dimensional ratios, angles, and the like of the respective constituent elements are appropriately changed for easy understanding of the configuration.

(First embodiment)
First, the screen device according to the first embodiment will be described with reference to FIGS. 1, 2, and 3. 1, 2, and 3 are diagrams illustrating a schematic structure of the screen device according to the first embodiment. 1A and 1B are diagrams of the screen device in the extended state, FIG. 1A is a side view of the screen device, and FIG. 1B is a rear view of the screen device. 2A and 2B are diagrams of the screen device in the housed state, FIG. 2A is a side view, and FIG. 2B is a rear view. FIG. 3 is a detailed view of the winding structure used in this embodiment.

  As shown in FIG. 1, a screen device 1 according to the first embodiment includes a substantially short screen 10 having flexibility, an auxiliary curtain 20 as a flexible fabric that is a tension member, and a first screen. The support member 30 as a support body, the winding mechanism 40 as the support portion 2, the winding mechanism 50 as the support portion 3, the pantograph mechanism 60 as the lifting device of the support portion 1, the winding mechanism 40, and the winding mechanism 50. And a base member 70 to which the pantograph mechanism 60 is attached. The screen device 1 is configured such that the screen 10 and the auxiliary curtain 20 are both pulled out and extended when in use, and the screen 10 and the auxiliary curtain 20 are wound around a winding mechanism 40 and a winding mechanism 50 when not in use. . Here, the case where the screen apparatus 1 is installed on the floor surface indicated by the hatched portion will be described as an example.

  In the following, the floor surface side on which the screen device 1 is installed is also referred to as the lower side, and the ceiling surface side is also referred to as the upper side. When the screen apparatus 1 is used, the use state in which the screen 10 is substantially flat and the projection surface is formed is also referred to as a stretched state. In the extended state of the screen 10, the projection surface side is also referred to as the front surface, the opposite side to the projection surface is referred to as the back surface, the right side when viewed from the back side is referred to as right, and the left side as viewed from the back side. In FIG. 1, the auxiliary curtain 20 and the winding mechanism 50 are seen through.

  The screen 10 is a reflective screen having flexibility, and displays an image by reflecting image light projected from a projector or the like on a projection surface on the front side. The screen 10 has sides that face each other, and has a side 11 that is one end thereof and a side 12 that is the other end. The side part 11 and the side part 12 are substantially parallel to each other. Below, the direction along the side part 11 and the side part 12 is also called an X direction. The side portion 11 is supported by the support member 30, and the side portion 12 is supported by a winding shaft 41 provided in the winding mechanism 40. Similarly to the screen 10, the auxiliary curtain 20 also has side portions facing each other, has a side portion 21 that is one end thereof, and a side portion 22 that is the other end, and is substantially parallel to each other. The side portion 21 is supported by the first support 30, and the side portion 22 is supported by a winding shaft 51 provided in the winding mechanism 50.

  A center line CL indicated by a one-dot chain line is a line connecting the center of the side portion 11 in the X direction and the center of the side portion 12 in the X direction, and is substantially orthogonal to the X direction. Hereinafter, the direction along the center line CL is also referred to as the Z direction, and the X direction and a direction substantially orthogonal to the Z direction are also referred to as the Y direction. A surface formed by the X direction and the Y direction is a surface substantially parallel to the floor surface on which the screen device 1 (base portion 70) is installed. In addition, the surface constituted by the X direction and the Z direction is a surface substantially parallel to the projection surface of the screen 10 in the extended state.

  The base part 70 is located on the floor surface side where the screen device 1 is installed, and extends along the X direction. A winding mechanism 40, a winding mechanism 50, a bearing portion 71, and a pantograph mechanism 60 are attached to the base portion 70. The pantograph mechanism 60 is configured by a known member used for a screen such as a pantograph described in Patent Document 1.

  The winding mechanism 40 (50) is disposed such that a winding shaft 41 (51) included in the winding mechanism 40 (50) extends in the X direction. Further, the pantograph mechanism 60 is disposed in parallel to a plane constituted by the X direction and the Z direction, and is substantially centered in the X direction of the pantograph mechanism 60 in the extended posture and substantially centered in the X direction of the winding mechanism 40. The substantially central portion in the X direction of the winding mechanism 50 is disposed in substantially the same plane. A pair of bearing portions 71 that pivotally support the winding mechanism 40 (50) are disposed at both ends in the X direction of the winding mechanism 40 (50).

  The winding mechanism 40 and the winding mechanism 50 extend along the X direction substantially parallel to the base portion 70. The winding mechanism 40 (50) has a winding shaft 41 (51), a torsion spring 42 (52), and a shaft 43 (53). The winding shaft 41 is formed in a cylindrical shape so as to extend along the X direction, and supports the side portion 12 of the screen 10. The winding shaft 41 is a shaft that winds up the screen 10. Similarly to the winding shaft 41, the winding shaft 51 is formed in a cylindrical shape so as to extend along the X direction, and supports the side portion 22 of the auxiliary curtain 20. The winding shaft 51 is a shaft that winds up the auxiliary curtain 20.

  The torsion spring 43 (53) and the shaft 42 (52) are inserted in the vicinity of the end of the winding shaft 41 (51), and extend along the X direction in the same manner as the winding shaft 41 (51). Yes. The torsion spring 43 (53) is arranged so as to apply a force in the rotational direction in which the screen 10 and the auxiliary curtain 20 are pulled out during expansion. The torsion spring 43 (53) has one end fixed to the winding shaft 41 (51) and the other end fixed to the shaft 42 (52). The shaft 42 (52) is supported by a bearing portion 71 provided in the base portion 70. Supported and restricted in rotation. By doing so, when the winding shafts 41 and 51 are rotated in the direction in which the screen 10 and the auxiliary curtain 20 are pulled out, an urging force for rotating in the winding direction is generated.

  When the pantograph mechanism 60 rises, a biasing force is generated that rotates in the direction in which the screen 10 and the auxiliary curtain 20 are pulled out and rotates in the winding direction. Therefore, substantially the same tension is applied to the screen 10 and the auxiliary curtain 20 along the vertical direction (Z direction) by the winding mechanisms 40 and 50 during the expansion. Accordingly, the forces are balanced before and after the pantograph mechanism 60, and the pantograph mechanism 60 maintains a vertical posture, so that the image from the projector can be maintained well without tilting the screen body.

  Further, when the screen 10 is stored, the screen 10 and the auxiliary curtain 20 can be wound and stored on the winding shaft 41 and the winding shaft 51, respectively, by the urging force of the winding mechanisms 40 and 50. (See FIGS. 2A and 2B).

  As described above, according to the configuration of the screen device 1 according to the first embodiment, the following effects can be obtained.

  (1) The winding mechanism 40 and the winding mechanism 50 apply substantially equal tension along the vertical direction (Z direction) to the screen 10 and the auxiliary curtain 20, and the force balances before and after the pantograph 60. By maintaining the 60 vertical posture, the image from the projector can be maintained well without tilting the screen body.

  (2) When the screen device 1 is stored, the screen 10 and the auxiliary curtain 20 can be wound around the winding shaft 41 and the winding shaft 51 by the urging force of the winding mechanism 40 and the winding mechanism 50, respectively. It can be easily carried without taking.

(3) By covering the front and rear of the pantograph mechanism 60 with the screen 10 and the auxiliary curtain 20, it becomes impossible to easily put a hand or the like into the joint part of the lifting mechanism, thereby reducing the risk of an accidental finger nail. be able to.
(4) By attaching the screen 10 to the front of the pantograph mechanism 60 and the auxiliary curtain 20 to the back, it is possible to project an image on the back of the screen device. Therefore, images can be projected simultaneously on the front and back surfaces.

  In the above description, the case where the screen device 1 is installed on the floor surface has been described as an example. However, the screen device 1 can be installed and used on the ceiling surface.

(Second Embodiment)
Next, a screen device according to a second embodiment will be described with reference to the drawings. 4, 5, and 6 are diagrams illustrating a schematic configuration of the screen device according to the second embodiment. Specifically, FIGS. 4A and 4B are diagrams of the screen device in the extended state, FIG. 4A is a side view of the screen device, and FIG. 4B is a rear view of the screen device. . FIGS. 5A and 5B are diagrams of the screen device in the housed state, FIG. 5A is a side view, and FIG. 5B is a rear view. FIG. 6 is a detailed view of the winding structure used in this embodiment.

  The screen device 2 according to the second embodiment is different from the screen device 1 according to the first embodiment in that the wire 80 is a flexible string-like member that is a tensile member and the wire 80 is wound as a third support. The structure 90 is different, but the other configurations are the same. Constituent elements common to the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  The wire 80 has an end portion 81 that is one end thereof and an end portion 82 that is the other end. The end portion 81 is supported by the support 30, and the end portion 82 is a drum provided in the winding mechanism 90. 91.

  As shown in FIG. 6, the winding mechanism 90 is disposed on the back surface of the pantograph 60 and includes a drum 91, a mainspring spring 92, an adjustment shaft 93, and a housing 94 having an opening 941 that communicates the inside and the outside. .

  The drum 91 is rotatably housed inside the housing 94 and supports an end portion 82 of the wire 80 inserted into the housing 94 through the opening 941. By rotating the drum 91, the wire 80 is supported. Can be wound up. The mainspring spring 92 is disposed inside the drum 91, one end is fixed to the drum 91, and the other end is fixed to the adjustment shaft 93. The mainspring spring 92 is arranged so as to apply a force in the rotational direction in which the wire 80 is wound up when the wire 80 is pulled out. The adjustment shaft 93 is attached to the housing 94 so as to be positioned at the approximate center of the drum 91, and a part of the adjustment shaft 93 projects outside the housing 94. Then, the urging state of the mainspring spring 92 can be adjusted by rotating the protruding portion 931 of the adjustment shaft 93.

  With the above configuration, when the screen 10 is pulled out from the winding mechanism 40, the wire 80 is also pulled out from the winding mechanism 90, and the wire 80 is wound around the mainspring spring 92 via the drum 91 to which the wire 80 is fixed. An urging force is generated in the direction of taking. Therefore, at the time of stretching, tension along the vertical direction (Z direction) is generated on the screen 10 and the wire 80 by the winding mechanism 40 and the winding structure 90, respectively. However, since the winding mechanism 40 and the winding mechanism 90 are different in structure, a tension along a substantially equal vertical direction (Z direction) is not always generated. Therefore, by rotating the protruding portion 931 of the adjustment shaft 93 of the winding mechanism 90, it is possible to adjust the urging state of the mainspring spring 92 and adjust the tension to substantially the same as that of the screen 10.

  By doing so, the force is balanced before and after the pantograph 60 and the pantograph 60 maintains a vertical posture, so that the image from the projector can be maintained well without tilting the screen body.

  Further, when the screen 10 is stored, the screen 10 and the wire 80 can be wound and stored on the winding shaft 41 and the drum 91, respectively, by the urging force of the tension applying mechanism (FIG. 5A). (B) See FIG.

  As described above, according to the configuration of the screen device 2 according to the second embodiment, the following effects can be obtained.

  (1) A substantially equal tension is applied to the screen 10 and the wire 80 in the vertical direction (Z direction) by the winding mechanism 40 and the winding mechanism 90, and the force is balanced between the front surface and the back surface of the pantograph 60. By maintaining the 60 vertical posture, the image from the projector can be maintained well without tilting the screen body.

  (2) The posture of the pantograph 60 can be adjusted by rotating the protrusions 931 of the 93 provided in the winding structure 90 and adjusting the biasing state of the mainspring spring 92.

  (3) When the screen device 2 is stored, the screen 10 and the wire 80 can be wound around the winding shaft 41 and the drum 91, respectively, by the urging force of the winding mechanism 40 and the winding mechanism 90. Can be carried easily.

  In the above description, the case where the screen device 2 is installed on the floor surface has been described as an example. However, the screen device 2 may be installed and used on the ceiling surface.

  DESCRIPTION OF SYMBOLS 1, 2 ... Screen apparatus 10 ... Screen 11, 12 ... Side part 20 ... Auxiliary curtain 21, 22 ... Side part 30 ... Supporting member 40, 50 ... Winding mechanism 41, 51 ... Winding shaft 42, 52 ... Torsion spring 43 53 ... Shaft 60 ... Pantograph mechanism 70 ... Base part 71 ... Bearing part 80 ... Wire 81, 82 ... End part 90 ... Winding mechanism 91 ... Drum 92 ... Mainspring spring 93 ... Adjustment shaft 94 ... Housing 931 ... Projection part 941 …Aperture.

Claims (5)

A substantially rectangular screen body having flexibility;
A first support attached to one end of the screen body;
A second support attached to the other end of the screen body facing the first support, and an elevating mechanism having one end attached to the first support;
It is arrange | positioned on the opposite side to the said screen main body with respect to the said raising / lowering mechanism, and one end is attached to the said 1st support body, and it is in a direction substantially parallel to the direction which goes to the said 2nd support body from the said 1st support member A screen device comprising: a tension member that applies a tensile force. The screen device according to claim 1.
A base member attached to the other end of the lifting mechanism;
And a third support attached to the other end of the tension member, and the second support or the third support is attached to the base member. The screen device according to claim 2.
The screen device, wherein the tension member is a flexible cloth. The screen device according to claim 3.
The screen device, wherein the second support or the third support has a winding structure. The screen device according to claim 2.
The tension member is a string-like member;
The screen device, wherein the second support or the third support has a winding structure.

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